Possibly a source of sauce during supper-time (4)

I believe the answer is:

pert

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'possibly a source of sauce' is the definition.
I can't tell whether this definition defines the answer.

'during supper-time' is the wordplay.
'during' indicates a hidden word.
'PERT' is hidden within 'supper time'.

Can you help me to learn more?

(Other definitions for pert that I've seen before include "Forward - saucy" , "Cheeky, saucy" , "Saucy, maybe brash" , "Saucy and chipper" , "Saucy, lively" .)

I've seen this clue in the Evening Standard.

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