Break bags I take once more (5)

I believe the answer is:

resit

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'break bags i take once more' is the definition.
I can't tell whether this defines the answer.

'break bags i' is the wordplay.
'break' becomes 'rest' (a rest is taking a break).
'bags' indicates putting letters inside (bag can mean secures or steals).
'rest' enclosing 'i' is 'RESIT'.

Can you help me to learn more?

(Other definitions for resit that I've seen before include "Student's test" , "second exam" , "take another exam" , "repeated test" , "later exam" .)

I've seen this clue in The Guardian.

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