Saint with car takes leisurely walks (7)
I believe the answer is:
strolls
'leisurely walks' is the definition.
(I've seen this in another clue)
'saint with car' is the wordplay.
'saint' becomes 'st' (abbreviation).
'with' is a charade indicator (letters next to each other).
'car' becomes 'rolls' (short for Rolls Royce).
'st'+'rolls'='STROLLS'
'takes' acts as a link.
(Other definitions for strolls that I've seen before include "Takes a turn" , "Saunters" , "Ambles" , "Walks" .)