Spot for parking inside, yes? Possibly (4)
I believe the answer is:
espy
'spot' is the definition.
('espy' can be a synonym of 'spot')
'parking inside yes? possibly' is the wordplay.
'parking' becomes 'p'.
'inside' is an insertion indicator.
'possibly' indicates anagramming the letters.
'yes' anagrammed gives 'esy'.
'p' going within 'esy' is 'ESPY'.
'for' is the link.
(Other definitions for espy that I've seen before include "See" , "Detect" , "Spot; observe" , "Catch a glimpse of" , "Behold" .)