Crossword Genius

Bolt a plate while it's hot (5)

Ross

I believe the answer is:

rivet

I'm a little stuck... Click here to teach me more about this clue!

'bolt' is the definition.
(I've seen this before)

'a plate while it's hot' is the wordplay.
I cannot quite understand how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found in the answer.
The remaining letters 'rive' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for rivet that I've seen before include "Metal pin; engross" , "Short metal fastener" , "Engross attention" , "Fasten -- engross" , "Fascinate" .)

I've seen this clue in the Evening Standard.
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