Crisp hock has super finish - something for Christmas? (5,7)

I believe the answer is:

prawn cracker

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'crisp' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'hock has super finish something for christmas?' is the wordplay.
'hock' becomes 'pawn' (synonyms).
'has' indicates putting letters inside.
'finish' suggests the final letters.
'something for christmas?' becomes 'cracker' (I am not sure about this - if you are sure you should believe this answer much more).
The last letter of 'super' is 'r'.
'pawn' placed around 'r' is 'prawn'.
'prawn'+'cracker'='PRAWN CRACKER'

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(Another definition for prawn cracker that I've seen is " Popular oriental snack".)

I've seen this clue in The Irish Times.

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