Skinhead's determination to drink copiously (5)
I believe the answer is:
swill
'drink copiously' is the definition.
'swill' can be an answer for 'drink' (swilling is a kind of drinking). I'm not sure about the 'copiously' bit.
'skinhead's determination' is the wordplay.
'skinhead' becomes 's' (head letter of 'skin').
'determination' becomes 'will' (will can mean determination or desire).
's'+'will'='SWILL'
'to' is the link.
Can you help me to learn more?
(Other definitions for swill that I've seen before include "Waste food left in wills" , "Hogwash" , "Pigfeed" , "Rinse - pig food" , "drink heavily" .)