Beggar bragged about attire (4)
I believe the answer is:
garb
'attire' is the definition.
(both can mean clothing)
'beggar bragged about' is the wordplay.
'about' says the answer is hidden in the clue (the clue goes around or about the answer).
'GARB' can be found hidden inside 'beggar bragged'.
(Other definitions for garb that I've seen before include "Apparel, attire" , "something to wear" , "Kit" , "Covering" , "Fashion of dress" .)