Drift aloft, perhaps (5)

I believe the answer is:

float

'drift' is the definition.
(synonyms)

'aloft perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'aloft' is an anagram of 'FLOAT'.

(Other definitions for float that I've seen before include "Be buoyant" , "Not sink" , "Drift aimlessly" , "Petty cash - rest on a liquid's surface" , "Petty cash - milk vehicle - fishing aid" .)

I've seen this clue in the Evening Standard.

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