Classy shop destroyed (4)
I believe the answer is:
posh
'classy' is the definition.
(I know that classy can be written as posh)
'shop destroyed' is the wordplay.
'destroyed' indicates anagramming the letters.
'shop' anagrammed gives 'POSH'.
(Other definitions for posh that I've seen before include "Upper-class - Victoria Beckham?" , "Shop around to be classy" , "High-class" , "Upper-class - elegant" , "Stylishly luxurious" .)