Conflict, including about transport of supplies (7)
I believe the answer is:
freight
'transport of supplies' is the definition.
'freight' can be an answer for 'transport' (freight is a kind of transport). I am not sure about the 'of supplies' bit.
'conflict including about' is the wordplay.
I cannot quite see how this works, but
'about' could be 're' ('re' means regarding or about) and 're' is found in the answer.
'conflict' could be 'fight' (fight is a kind of conflict) and 'fight' is found in the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for freight that I've seen before include "Transport of bulk goods" , "Goods in transit" , "Cargo, goods transported" , "Something carried" , "Consignment" .)