The compiler's left to provide meaning (6)
I believe the answer is:
import
'meaning' is the definition.
(import is a kind of meaning)
'the compiler's left' is the wordplay.
'the compiler's' becomes 'im' (I've seen this in other clues).
'left' becomes 'port' (left side of a ship - opposite of starboard).
'im'+'port'='IMPORT'
'to provide' acts as a link.
(Other definitions for import that I've seen before include "introduction" , "Bring in; significance" , "Drift" , "Item from abroad" , "Convey" .)