Vehicle access skirting front of posh woodwork (9)
I believe the answer is:
carpentry
'woodwork' is the definition.
(synonyms)
'vehicle access skirting front of posh' is the wordplay.
'vehicle' becomes 'car' (car is a kind of vehicle).
'access' becomes 'entry' (entry is a kind of access).
'skirting' indicates putting letters inside.
'front of' suggests taking the first letters.
The initial letter of 'posh' is 'p'.
'car'+'entry'='carentry'
'carentry' going around 'p' is 'CARPENTRY'.
(Other definitions for carpentry that I've seen before include "The purpose of chips" , "Trade" , "part of building" , "Joining work" , "Craft of a woodworker" .)