Commercial break that's somewhat aimless (6)

I believe the answer is:

adrift

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'somewhat aimless' is the definition.
'adrift' can be an answer for 'aimless' (synonyms). I am not certain of the 'somewhat' bit.

'commercial break' is the wordplay.
'commercial' becomes 'ad' (abbreviation for advertisement).
'break' becomes 'rift' (rift can mean a break or opening).
'ad'+'rift'='ADRIFT'

'that's' acts as a link.

Can you help me to learn more?

(Other definitions for adrift that I've seen before include "Wandering aimlessly" , "Afloat without steerage" , "cut loose" , "out of touch" , "Unanchored - lost" .)

I've seen this clue in The Irish Times.

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