Crossword Genius

Team with one fan forced into a big effort (2,4,4)

Ross

I believe the answer is:

no mean feat

I'm a little stuck... Click here to teach me more about this clue!

'team' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'one fan forced into a big effort' is the wordplay.
I cannot quite see how this works, but
'one' could be 'me' (a setter might use 'one' to humourously mean 'me') and 'me' is located in the answer.
an anagram of 'fan' is 'anf' which is within the answer.
'a' is within the answer.
This explanation may well be incorrect...

'with' acts as a link.

Can you help me to learn more?

I've seen this clue in The Sunday Times.
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