Ace trio modelled for saucy material (7)
I believe the answer is:
erotica
'saucy material' is the definition.
(erotica is pornographic material)
'ace trio modelled' is the wordplay.
'modelled' is an anagram indicator (I've seen 'modelling' mean this).
'ace'+'trio'='acetrio'
'acetrio' anagrammed gives 'EROTICA'.
'for' acts as a link.
(Other definitions for erotica that I've seen before include "Salacious" , "Material of a sexual nature" , "Writing of a sexual nature" , "arousing stuff" , "Raunchy material" .)