Belts will be found in the men's-wear department (5)
I believe the answer is:
socks
'belts' is the definition.
(I've seen this in another clue)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for socks that I've seen before include "Woollen footwear or slang punches" , "Foot warmers and wind cones" , "Half-hose" , "usually come in pairs" , "Are belts" .)