Remove attacking threat from team, introducing right back (5)
I believe the answer is:
unarm
'remove attacking threat from' is the definition.
I can't judge whether this definition defines the answer.
'team introducing right back' is the wordplay.
'team' becomes 'manu' (short for Manchester United).
'introducing' means one lot of letters goes inside another (some letters introduced or inserted into others).
'right' becomes 'r' (abbreviation).
'back' is a reversal indicator.
'manu' going around 'r' is 'mranu'.
'mranu' in reverse letter order is 'UNARM'.
Can you help me to learn more?
(Other definitions for unarm that I've seen before include "Make harmless" , "Disable" , "Remove firing pieces" , "Remove weaponry from" , "Deprive of all weapons" .)