Notice split when floating away (6)
I believe the answer is:
adrift
'floating away' is the definition.
'adrift' can be an answer for 'floating' (thesaurus). I am unsure of the 'away' bit.
'notice split' is the wordplay.
'notice' becomes 'ad' (short for advert).
'split' becomes 'rift' (I've seen this in other clues).
'ad'+'rift'='ADRIFT'
'when' acts as a link.
Can you help me to learn more?
(Other definitions for adrift that I've seen before include "Unsettled or unanchored" , "getting nowhere?" , "Floating unattached as at sea" , "without purpose or direction" , "Loose from moorings" .)