Crossword Genius

In expedition hands down tools to do one bolt (9,6)

Ross

I believe the answer is:

lightning strike

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

'bolt' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'in expedition hands down tools to do one' is the wordplay.
I cannot quite understand how this works, but
'in' is present in the answer.
'one' could be 'li' (I've seen this in other clues) and 'li' is found within the answer.
'down tools' could be 'strike' (I've seen this before) and 'strike' is located in the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for lightning strike that I've seen before include "not supposed to be repeated in one place" , "Type of industrial action" , "immediate action" , "Spontaneous coming out" , "that a place only witnesses once?" .)

I've seen this clue in The Independent.
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