Tent cut in the back with sword (5)

I believe the answer is:
tepee
'tent' is the definition.
(tepee is a kind of tent)
'cut in the back with sword' is the wordplay.
'cut in the back' becomes 't' (I can't justify this - if you can you should believe this answer much more).
'with' is a charade indicator (letters next to each other).
'sword' becomes 'epee' (sword used in fencing).
't'+'epee'='TEPEE'
Can you help me to learn more?
(Other definitions for tepee that I've seen before include "Wigwam" , "Native American tent" , "Wherein Sioux" , "temporary shelter" , "home for Native Americans" .)
