Get someone else to do the fighting (7)
I believe the answer is:
recruit
'get' is the definition.
The definition and answer can be both related to competing as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for recruit that I've seen before include "Enlist for military service" , "Newly enlisted person" , "Trainee" , "A new member or conscript" , "New entrant as to the army or police" .)