Hurt the cockney carrying the gun (6)
I believe the answer is:
harmed
'hurt' is the definition.
(I've seen this in another clue)
'cockney carrying the gun' is the wordplay.
'cockney' becomes 'h' (I can't explain this - if you can you should give a lot more credence to this answer).
'carrying the gun' becomes 'Armed'.
'h'+'armed'='HARMED'
'the' is the link.
Can you help me to learn more?
(Other definitions for harmed that I've seen before include "Injured or damaged" , "Hurt" .)