Out-of-form team wrongly positioned on field (7)
I believe the answer is:
offside
'positioned on field' is the definition.
The answer and definition are different parts of speech. However, adjectives and past participle verbs occasionally mean the same thing.
'out-of-form team wrongly' is the wordplay.
I cannot quite understand how this works, but
'out' could be 'off' (I've seen this before) and 'off' is present in the answer.
'team' could be 'side' (both can mean a sports team) and 'side' is found within the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for offside that I've seen before include "Illegal football position between the ball and opponents' goal" , "Illegal state in football" , "A football offence" , "in no position to score goal" , "Dies off in illegal soccer position" .)