Garment varying in cut (5)
I believe the answer is:
tunic
'garment' is the definition.
(historical type of garment)
'varying in cut' is the wordplay.
'varying' indicates anagramming the letters.
'in'+'cut'='incut'
'incut' is an anagram of 'TUNIC'.
(Other definitions for tunic that I've seen before include "Simple garment" , "Shift" , "Policeman may be in one" , "piece of clothing" , "Roman garment" .)