Clothes shop known to have better suiting? (9)
I believe the answer is:
outfitter
'clothes shop' is the definition.
(shop that sells outfits)
'known to have better suiting?' is the wordplay.
'known' becomes 'out' (I've seen this before).
'to have' is a charade indicator (letters next to each other).
'better suiting?' becomes 'fitter' (more fit or appropriate).
'out'+'fitter'='OUTFITTER'
(Other definitions for outfitter that I've seen before include "Men's clothes shop" , "Trader" , "Men's clothing shop" , "One dealing in clothing" , "It suits one" .)