Encourage cook, perhaps, to provide snack (3,2,5)

I believe the answer is:

egg on toast

'snack' is the definition.

'encourage cook perhaps' is the wordplay.
'encourage' becomes 'egg on' (to egg somebody on is to encourage them).
'cook perhaps' becomes 'toast' (toasting is a type of cooking).
'eggon'+'toast'='EGG ON TOAST'

'to provide' is the link.

I've seen this clue in The Guardian.

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