At intervals, dad exercises (6)

I believe the answer is:

pauses

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'at intervals' is the definition.
'pauses' can be an answer for 'intervals' (pause is a kind of interval). I am not sure about the 'at' bit.

'dad exercises' is the wordplay.
'dad' becomes 'pa' ('pa' can be a synonym of 'dad').
'exercises' becomes 'uses' ('use' can be a synonym of 'exercise').
'pa'+'uses'='PAUSES'

Can you help me to learn more?

(Other definitions for pauses that I've seen before include "Brief interruptions" , "Short stops" , "Takes a short break" , "Short breaks in business" , "Temporary suspensions" .)

I've seen this clue in the Evening Standard.

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