"conduit for expression" is correct and usable in written English.
You can use it to refer to something that enables or facilitates a person's communication or expression of ideas, feelings, opinions, etc. For example, you could say: "This open mic night provides a conduit for expression, allowing performers to share their music and art with others."
Only jazz exists solely as a conduit for the expression of individual personality, in its full range.
Like Michael Haneke in The Piano Teacher, Audiard cleverly shows how the rigour of classical piano is not a gentle conduit for artistic expression but an impossibly cruel taskmaster, codifying the dark side of human nature.
The teacher of Kiril's class insists on it because, like a lot of romantics (and a lot of teachers), he wants to imagine language as a conduit for personal expression, or a window into the hearts of others.
To imply that the rock guitarist Carlos Santana's sound, or the drumming of John Bonham from Led Zeppelin, is less unique because "only jazz exists solely as a conduit for the expression of individual personality, in its full range," is blatantly disrespectful and simply untrue.
Galleries such as London's SoundFjord have dedicated their stable to presenting and researching sound art, offering an educational arm to art presentation to enlighten and inspire visitors to appreciate sound art as a conduit for artistic expression.
The legal sanctioning of doctors to assist patients in killing themselves may create a new, undesirable conduit for the expression of hostile countertransference.
Yet that information would not surprise Iasos one bit, because the 66-year-old believes he is an earthly conduit for the musical expressions of a being named Vista, who transmits ideas to Iasos telepathically, which he then turns into song.
The expression of ferredoxins and a hydrogenase provides a potential conduit for disposing of and transferring electrons in the absence of exogenous electron acceptors.
Using RNAi with the adult parasites, and following the heterologous expression of SmAQP in Xenopus oocytes, we provide evidence that this protein can act as a conduit for lactate.
I'm only a conduit for change.
Jazz has been a conduit for him".
