The phrase "already indispensable" is correct and usable in written English.
It can be used to describe something that has become essential or necessary at an earlier point than expected.
Example: "With the rapid advancements in technology, smartphones have become already indispensable in our daily lives."
Alternatives: "already essential" or "already crucial".
He was already indispensable to Sennett, however, who acceded to Chaplin's demand to be allowed to direct his own films.
The 21-year-old Martinez is in his second full season with the first team and is already indispensable.
Meanwhile, high-throughput design and synthesis of extremely comprehensive DNA sequences have evolved into an enabling technology already indispensable in various life science sectors today.
As Keith Houston points out in his notes for further reading, there is already an indispensable guide to the history of punctuation – Malcolm Parkes's Pause and Effect: Punctuation in the West.
When Woody Allen made that film, the fifty-nine-story tower, completed in 1977 and designed by the architect Hugh Stubbins, Jr., was just over a year old, but was already an indispensable part of the skyline's accidental beauty.
Such studies need to be accompanied by rigorous correlative analysis if we are to understand the importance of various mechanisms of action of rituximab and use that information to improve on what is already an indispensable component of therapy.
Commenting on the funding in a statement, Jain said: "Having followed Silent Circle's growth and profile in the industry, we are excited about backing the company's future and fulfilling the wider demand for accessible, easy to use privacy apps that are already an indispensable means of communication.
In a lineup thick with 20-point scorers and presumed franchise players, Randolph has already made himself indispensable.
He's already (a) the indispensable leader for the American effort in Afghanistan, and (b) on a very tight rope himself.
Levine, then thirty-one years old, had been serving as the company's principal conductor for three years, and had already made himself indispensable.
By reaching the finals of all four Grand Slam tournaments and by winning his first French Open and securing his record 15th major singles title, at Wimbledon, Federer has already become the indispensable man of 2009.
