reach for the stars (6)
I believe the answer is:
'reach for the stars' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for aspire that I've seen before include "Is a rep (anag.)" , "Have an ambitious plan or a lofty goal" , "Strive for higher things" , "Wish to rise (to)" , "Yearn, dream (towards)" .)