Make a hole in a sock? (5)
I believe the answer is:
punch
'a sock?' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for punch that I've seen before include "striking power" , "Hook, maybe" , "Blow with the fist" , "Judy's puppet husband" , "Vigorous blow" .)