Huge amount of cotton socks (4)
I believe the answer is:
tons
'huge amount' is the definition.
'tons' can be an answer for 'amount' (tons is a kind of amount). I'm not certain of the 'huge' bit.
'of cotton socks' is the wordplay.
'of' indicates a hidden word.
'TONS' is hidden within 'cotton socks'.
Can you help me to learn more?
(Other definitions for tons that I've seen before include "Each is equivalent to 2240 pounds" , "Loads (sl.)" , "A lot" , "Lots" .)