Change course endlessly as you search (5)

I believe the answer is:

scour

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'you search' is the definition.
'scour' can be an answer for 'search' (thesaurus). I am not sure about the 'you' bit.

'change course endlessly' is the wordplay.
'change' is an anagram indicator.
'endlessly' means to remove the last letter.
'course' with its last letter taken off is 'cours'.
'cours' anagrammed gives 'SCOUR'.

'as' acts as a link.

Can you help me to learn more?

(Other definitions for scour that I've seen before include "scrub and scrape" , "Attack with brush" , "Clean - scout" , "Scrub hard" , "Turn upside down" .)

I've seen this clue in the Evening Standard.

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