Desire, perhaps represented by Sartre, etc (9)
I believe the answer is:
streetcar
'desire perhaps' is the definition.
(I've seen this before)
'represented by sartre etc' is the wordplay.
'represented by' indicates an anagram.
'sartre'+'etc'='sartreetc'
'sartreetc' anagrammed gives 'STREETCAR'.
(Other definitions for streetcar that I've seen before include "Desire, perhaps" , "Tennessee Williams play 'A . . . . . . . . . Named Desire'" , "public transport?" , "US tram (named Desire?)" , ""Desire" was one" .)