Hamper speculation about request (6)
I believe the answer is:
basket
'hamper' is the definition.
(I've seen this in another clue)
'speculation about request' is the wordplay.
'speculation' becomes 'bet' (bet is a kind of speculation).
'about' indicates putting letters inside.
'request' becomes 'ask' (to ask is to request something).
'bet' going around 'ask' is 'BASKET'.
(Other definitions for basket that I've seen before include "Container made of interwoven cane or wire" , "Container for shopping" , "Shopping holder" , "Container of woven twigs etc" , "Woven container for carrying food etc" .)