Be provocative in fine dress material (7)
I believe the answer is:
inflame
'be provocative' is the definition.
(I've seen this before)
'in fine dress material' is the wordplay.
'fine' becomes 'f' (abbreviation).
'dress material' becomes 'lame' (lame is a kind of material. I am not sure about the 'dress' bit.).
'in'+'f'+'lame'='INFLAME'
Can you help me to learn more?
(Other definitions for inflame that I've seen before include "Provoke to anger" , "Intensify, aggravate" , "Incite" , "Be provocative" , "Make (a situation) worse" .)