Token oilman working after a touch of nerves (7)
I believe the answer is:
nominal
'token' is the definition.
('nominal' can be a synonym of 'token')
'oilman working after a touch of nerves' is the wordplay.
'working' indicates an anagram.
'after' is a charade indicator (letters next to each other).
'a touch of' indicates taking the first letters.
The first letter of 'nerves' is 'n'.
'oilman' anagrammed gives 'ominal'.
'ominal' after 'n' is 'NOMINAL'.
(Other definitions for nominal that I've seen before include "Ironical understatement (gram mar.)" , "Token - lion-man (anag)" , "Titular" , "In name only or token payment" , "Trivial" .)