Crossword Genius

Suspenseful part - punching, grabbing! (4-6)

Ross

I believe the answer is:

nail-biting

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'suspenseful' is the definition.
(I know that suspenseful can be written as nail-biting)

'part punching grabbing' is the wordplay.
'part' becomes 'bit' (both mean a piece of something).
'punching' means one lot of letters goes inside another (some letters punch a hole in others).
'grabbing' becomes 'nailing' (I can't explain this - if you can you should give a lot more credence to this answer).
'bit' going inside 'nailing' is 'NAIL-BITING'.

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I've seen this clue in the Sydney Morning Herald.
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