Not in favour of being a model after work (8)
I believe the answer is:
opposing
'not in favour of being a' is the definition.
I can't judge whether this defines the answer.
'model after work' is the wordplay.
'model' becomes 'posing' (I can't justify this - if you can you should give a lot more credence to this answer).
'after' means one lot of letters go next to another.
'work' becomes 'op' (abbreviation for opus).
'posing' put after 'op' is 'OPPOSING'.
Can you help me to learn more?
(Other definitions for opposing that I've seen before include "modelling after work" , "Contending" , "trying to end a sea of troubles by it?" , "Going against" , "Disapproving" .)