Energies essentially expended in outburst, sub loves forty winks! (6)
I believe the answer is:
snooze
'forty winks' is the definition.
(I know that forty winks can be written as snooze)
'energies essentially expended in outburst sub loves' is the wordplay.
I cannot really understand how this works, but
'loves' could be 'oo' (love means 0 in tennis) and 'oo' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for snooze that I've seen before include "Kip" , "A brief nap" , "A short light sleep" , "Doze, nap" , "Some sleeping" .)