Guevara having friend round shows jungle knife (7)
I believe the answer is:
machete
'jungle knife' is the definition.
(I've seen this before)
'guevara having friend round' is the wordplay.
'guevara' becomes 'che' (revolutionary Che Guevara).
'having friend' becomes 'mate' (I can't explain this - if you can you should give a lot more credence to this answer).
'round' indicates putting letters inside.
'che' inserted within 'mate' is 'MACHETE'.
'shows' is the link.
Can you help me to learn more?
(Other definitions for machete that I've seen before include "A heavy-duty jungle knife" , "Cheat me over broad heavy knife used in jungle" , "The mace (anag.)" , "Broad heavy knife common in Central America" , "cutter" .)