Fresh search nets zero fish (7)

I believe the answer is:

roaches

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

'fresh search nets zero fish' is the definition.
I can't tell whether this definition defines the answer.

'fresh search nets zero' is the wordplay.
'fresh' is an anagram indicator (a fresh re-ordering of the letters).
'nets' is an insertion indicator (some letters are contained or netted).
'zero' becomes 'O' (O resembles 0).
'search' anagrammed gives 'raches'.
'raches' enclosing 'o' is 'ROACHES'.

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I've seen this clue in The Times.

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