Gaffer favouring a change of name? (7)
I believe the answer is:
foreman
'gaffer' is the definition.
('foreman' can be a synonym of 'gaffer')
'favouring a change of name?' is the wordplay.
'favouring' becomes 'for' (I've seen this before**).
'a change of' is an anagram indicator.
'name' is an anagram of 'eman'.
'for'+'eman'='FOREMAN'
(Other definitions for foreman that I've seen before include "Gaffer, boss" , "Supervising worker" , "Gaffer, overseer" , "spokesman" , "Charge hand" .)