I lose mac, awkward thing to wear (8)
I believe the answer is:
camisole
'thing to wear' is the definition.
(type of garment)
'i lose mac awkward' is the wordplay.
'awkward' indicates anagramming the letters.
'i'+'lose'+'mac'='ilosemac'
'ilosemac' is an anagram of 'CAMISOLE'.
(Other definitions for camisole that I've seen before include "Underbodice with shoulder straps" , "Item of lingerie" , "jacket" , "nightwear" , "Loose underbodice" .)