One may have provided food for pet before? Right! (7)
I believe the answer is:
caterer
'one may have provided food' is the definition.
I can't judge whether this definition defines the answer.
'pet before? right' is the wordplay.
'pet' becomes 'cat' (cats are often kept as pets).
'before?' becomes 'ere' (poetic term for 'before').
'right' becomes 'r' (abbreviation).
'cat'+'ere'+'r'='CATERER'
'for' is the link.
Can you help me to learn more?
(Other definitions for caterer that I've seen before include "One providing food and drink" , "Someone who provides food and service" , "One providing food and service for a party" , "Provider of refreshments" , "Person who supplies food for social events" .)