Tool caught the man’s heel? Not half (6)
I believe the answer is:
chisel
'tool' is the definition.
(chisel is a kind of tool)
'caught the man's heel? not half' is the wordplay.
'caught the man' becomes 'chis' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'not half' suggests halving the letters.
'heel' cut in half is 'el'.
'chis'+'el'='CHISEL'
Can you help me to learn more?
(Other definitions for chisel that I've seen before include "Carpenter's or mason's tool" , "Cutting tool used with hammer" , "It can be cold in the workshop" , "Cutting tool for shaping wood or stone" , "Tool with bevelled edge for shaping wood" .)