Crossword Genius

It identifies the persevering and industrious individual (7)

Ross

I believe the answer is:

sticker

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

'it identifies the persevering and industrious individual' is the definition.
The definition suggests a singular noun which matches the answer.

'it' is the wordplay.
I cannot quite understand how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is located in the answer.
The remaining letters 'sicker' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for sticker that I've seen before include "Determined person" , "Adhesive label" , "Person with staying power" , "he soldiers on!" , "Gummed label" .)

I've seen this clue in the Evening Standard.
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