One may be burning to start attacking the enemy (4,4)
I believe the answer is:
open fire
'one may' is the definition.
Although both the answer and definition are verbs in their base form, I cannot see how one could define the other.
'burning to start attacking the enemy' is the wordplay.
I cannot really see how this works, but
'burning' could be 'fire' (fire is a kind of burning) and 'fire' is found in the answer.
'start' could be 'open' (opening is a kind of starting) and 'open' is located in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'be' acts as a link.
Can you help me to learn more?
(Other definitions for open fire that I've seen before include "Start attack" , "Get rounds in" , "traditional welcoming feature" , "Perhaps start sniping" , "chestnut roaster?" .)