Shoot for the moon (6)
I believe the answer is:
aspire
'shoot for the moon' 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 "Have ambition or desire for praise" , "Strive for higher things" , "I spare (anag.)" , "Persia (anag.)" , "Have aspiration for, aim at" .)