Agnostic at sea, cruising (8)

I believe the answer is:

coasting

'cruising' is the definition.
(thesaurus)

'agnostic at sea' is the wordplay.
'at sea' is an anagram indicator.
'agnostic' anagrammed gives 'COASTING'.

(Other definitions for coasting that I've seen before include "Not trying all that hard" , "Just rolling along with agnostic" , "Agnostic (anag) -- moving easily" .)

I've seen this clue in The Times.

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