Parking contract to give satisfaction (6)
I believe the answer is:
please
'give satisfaction' is the definition.
(I've seen this before)
'parking contract' is the wordplay.
'parking' becomes 'p'.
'contract' becomes 'lease' (lease is a kind of contract).
'p'+'lease'='PLEASE'
'to' acts as a link.
(Other definitions for please that I've seen before include "Satisfy aesthetically" , "suit" , "Gratify, make contented" , "Elapse (anag.)" , "Gratify or ask nicely" .)