Apply flexible rate at home after parking (7)
I believe the answer is:
pertain
'apply' is the definition.
(I've seen this before)
'flexible rate at home after parking' is the wordplay.
'flexible' is an anagram indicator (I've seen this in other clues).
'at home' becomes 'in' ('in' can be similar in meaning to 'at home').
'after' says to put letters next to each other.
'parking' becomes 'p' (**).
'rate' with letters rearranged gives 'erta'.
'erta'+'in'='ertain'
'ertain' put after 'p' is 'PERTAIN'.
(Other definitions for pertain that I've seen before include "Have relevance" , "Painter (anag) - relate (to)" , "Refer" , "Relate (to), apply (to)" , "Painter inclined to be relevant" .)