Idle moment up above (4,4)

I believe the answer is:

tick over

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

'moment up above' is the wordplay.
'moment' becomes 'tick' (I've seen this before).
'up above' becomes 'over' (I've seen this before. I am not sure about the 'up' bit.**).
'tick'+'over'='TICK OVER'

Can you help me to learn more?

(Other definitions for tick over that I've seen before include "Run smoothly (or very slowly?)" , "(Of engine) idle" , "(Of engine) run slowly in neutral" , "Just keep going like idling engine" .)

I've seen this clue in The Telegraph.

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