Get fidgety when jet gains minutes but loses time (6)

I believe the answer is:

squirm

'get fidgety' is the definition.

I can't explain the rest of the clue.

(Other definitions for squirm that I've seen before include "feel awkward" , "Wriggle with embarrassment" , "look embarrassed" , "Wriggle uncomfortably" , "Feel shame" .)

I've seen this clue in The Independent.

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