Crossword Genius

The upper class profit off student nurses (5)

Ross

I believe the answer is:

toffs

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

'the upper class profit off student nurses' is the definition.
I can't judge whether this defines the answer.

'profit off student nurses' is the wordplay.
'nurses' indicates a hidden word (nurse can mean holding closely).
'TOFFS' is hidden in the letters of 'profit off student'.

Can you help me to learn more?

(Other definitions for toffs that I've seen before include "Posh people" , "Posh folk" , "Posh blokes" , "Posh gents" , "smart people" .)

I've seen this clue in The Independent.
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