No points sadly, with one missing out all the time (7)

I believe the answer is:

nonstop

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'all the time' is the definition.
(nonstop can mean continually or all the time)

'no points sadly with one missing out' is the wordplay.
'points' becomes 'Ns' (two compass points).
'sadly with one missing out' becomes 'top' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'no'+'ns'+'top'='NONSTOP'

Can you help me to learn more?

(Other definitions for nonstop that I've seen before include "Ceaseless" , "Unending" , "Around-the-clock" , "Continuous, without pause" , "Ceaselessly" .)

I've seen this clue in The Guardian.

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