Rotten team not in position to score (7)

I believe the answer is:

offside

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'not in position to score' is the definition.
I can't judge whether this defines the answer.

'rotten team' is the wordplay.
'rotten' becomes 'off' (rotten food is 'off').
'team' becomes 'side' (both can mean a sports team).
'off'+'side'='OFFSIDE'

Can you help me to learn more?

(Other definitions for offside that I've seen before include "Dies off in illegal soccer position" , "A football offence" , "Illegal position for soccer player" , "Illegally ahead of the ball in soccer" , "Part of vehicle furthest from kerb" .)

I've seen this clue in The Times.

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