Health resort requiring small parking area (3)
I believe the answer is:
spa
'health resort' is the definition.
(spa can mean a health resort)
'small parking area' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'parking' becomes 'p' (abbreviation on road signs).
'area' becomes 'a' (maths abbreviation).
's'+'p'+'a'='SPA'
'requiring' acts as a link.
(Other definitions for spa that I've seen before include "Water source" , "A curative mineral spring, or place with one" , "eg Bath" , "Healthy place" , "health centre" .)