The phrase "a standby of" is correct and usable in written English.
It can be used to refer to something that is consistently relied upon or a common option in a particular context.
Example: "The classic black dress is a standby of every woman's wardrobe, suitable for various occasions."
Alternatives: "a staple of" or "a mainstay of".
Composites and invented figures were an old, if not honorable, journalistic tradition and a standby of newspaper feature writing.
During World War II the Dornier 17, a twin-engined bomber, was a standby of the Luftwaffe.
Safina attaches considerable significance to George W. Bush's attempt to suppress global warming science (this subject is a standby of Al Gore talks) without noting (neither does Gore) that the hush-up failed.
These days Grisham is a standby of another list as well: Forbes's annual ranking of the world's top-earning authors, which last year put him at No. 7 with estimated earnings of $18 million.
In another rare misstep, Gelb's press office last April arranged for Ruth Ann Swenson, the soprano who had been a standby of Met productions, to be interviewed by the Times in advance of her appearance in "Giulio Cesare".
This is a part that, as Netrebko says, usually goes to "a big fat lady angry, loud!" The role used to be a standby of Joan Sutherland and also of Birgit Nilsson (sometimes known, impolitely, as Beergut).
Finally, let's please put a moratorium on all mentions of "supporting the troops --a favoritroops --a of politroops --ad pundits alike that not only is vague but also just sounds stupid.
The purge-and-trap procedure included a standby temperature of 35°C, purge time of 10 min, desorb preheat of 160°C, desorb of 4 min at 175°C, and bake time of 4 min at 260°C.
It boasts a talk time of 2.5 hours and a standby time of 100 hours.
The battery has a talk time of about three hours and a standby time of about seven days.
(iv) Advance funds under a standby letter of credit as defined in paragraph (ee) of this section, a put, or other similar arrangement.
