Crossword Genius

Small firms take in cash (5)

Ross

I believe the answer is:

coins

'cash' is the definition.
(coins are cash)

'small firms take in' is the wordplay.
'small firms' becomes 'cos' (co is short for company - a business or firm; 'small' asks for a short form).
'take' means one lot of letters goes inside another.
'cos' going around 'in' is 'COINS'.

(Other definitions for coins that I've seen before include "change" , "Metal money" .)

I've seen this clue in The Globe and Mail.
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