Crossword Genius

Those searching find M is his and ____ (7)

Ross

I believe the answer is:

fishers

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

'those searching find m' is the definition.
I can't tell whether this definition defines the answer.

'his and' is the wordplay.
I cannot really see how this works, but
an anagram of 'his' is 'ish' which is within the answer.
This may be the basis of clue (or it may be nonsense).

'is' acts as a link.

Can you help me to learn more?

I've seen this clue in The Guardian.
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