Crossword Genius

Student's set back by small mistakes (4-3)

Ross

I believe the answer is:

slip-ups

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'mistakes' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'student's set back by small' is the wordplay.
'student's' becomes 'pupils' ('pupil' can be a synonym of 'student').
'set back' says the letters should be written in reverse.
'by' says to put letters next to each other.
'small' becomes 's' (abbreviation - e.g. clothes size).
'pupils' back-to-front is 'slipup'.
'slipup'+'s'='SLIP-UPS'

Can you help me to learn more?

(Another definition for slip-ups that I've seen is " Errors".)

I've seen this clue in The Independent.
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