Some sockeye salmon? Certainly! (3)

I believe the answer is:

yes

'certainly' is the definition.
(both can be used to answer in the affirmative)

'some sockeye salmon?' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'YES' is hidden within 'sockeye salmon'.

(Other definitions for yes that I've seen before include "Affirmative response" , "Pro vote" , "Affirmative reply" , "Word of agreement" , "Yea" .)

I've seen this clue in The Times.

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