Down tools? Just hammer and punch! (6)
I believe the answer is:
strike
'down tools?' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for strike that I've seen before include "Downing of tools" , "Hit; cancel" , "Agree on" , "Hit - miss (in baseball)" , "Attack - industrial action" .)