Busy worker securing wheels needs a cold drink (6,3)
I believe the answer is:
bering sea
'cold drink' is the definition.
('drink' can mean the sea)
'busy worker securing wheels needs a' is the wordplay.
'busy worker' becomes 'bee' (I've seen this in another clue).
'securing' indicates putting letters inside.
'wheels' becomes 'rings' (wheels are ring-shaped).
'needs' is a charade indicator (letters next to each other).
'bee' enclosing 'rings' is 'beringse'.
'beringse'+'a'='BERING SEA'
(Other definitions for bering sea that I've seen before include "the Russian border being fluid" , "body of water" , "Northern waters" , "cold drink" , "stretch of water" .)