They go round taking pounds in wagers (5)
I believe the answer is:
belts
'they go round' is the definition.
The definition suggests an adverb but the answer is not.
'pounds in wagers' is the wordplay.
'pounds' becomes 'L' (L can represent the monetary pound).
'in' indicates putting letters inside.
'wagers' becomes 'bets' ('bet' can be a synonym of 'wager').
'l' inserted into 'bets' is 'BELTS'.
'taking' acts as a link.
Can you help me to learn more?
(Other definitions for belts that I've seen before include "Waist bands" , "Hits" , "Leather bands" , "Moves quickly" , "Fat controllers perhaps" .)