Against modelling after work (8)
I believe the answer is:
opposing
'against' is the definition.
(thesaurus)
'modelling after work' is the wordplay.
'modelling' becomes 'posing' ('pose' can be a synonym of 'model').
'after' says to put letters next to each other.
'work' becomes 'op' (abbreviation for opus).
'posing' put after 'op' is 'OPPOSING'.
(Other definitions for opposing that I've seen before include "Disapproving" , "Contending" , "trying to end a sea of troubles by it?" , "Going against" , "modelling after work" .)