Bore about dress (4)
I believe the answer is:
robe
'dress' is the definition.
(I know that dress is a is a more specific form of the action of robe)
'bore about' is the wordplay.
'about' is an anagram indicator.
'bore' anagrammed gives 'ROBE'.
(Other definitions for robe that I've seen before include "Clerical garment" , "Loose garment for Boer" , "habit" , "Formal attire" , "Loose outer garment" .)