Tent's top cut off with sword (4)
I believe the answer is:
epee
'sword' is the definition.
(sword used in fencing)
'tent's top' is the wordplay.
'tent' becomes 'tepee' (tepee is a kind of tent).
'top' means to remove the first letter.
'tepee' with its first letter taken away is 'EPEE'.
'cut off with' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for epee that I've seen before include "Duelling blade" , "there's a point to it" , "Type of sword" , "sharp-edged implement" , "Thin fencing sword" .)