Choose a parking spot outside (5)
I believe the answer is:
adopt
'choose' is the definition.
(adopting is a kind of choosing)
'a parking spot outside' is the wordplay.
'parking' becomes 'p'.
'spot' becomes 'dot' (I've seen this before).
'outside' means one lot of letters goes inside another.
'p' placed within 'dot' is 'dopt'.
'a'+'dopt'='ADOPT'
(Other definitions for adopt that I've seen before include "Assume (attitude)" , "choose as candidate" , "make one's own" , "Foster" , "Acquire" .)