Holidaying only ever fizzled around midday (2,5)
I believe the answer is:
on leave
'holidaying' is the definition.
(I've seen this before)
'only ever fizzled around midday' is the wordplay.
I cannot really understand how this works, but
'around' could be 'o' (I've seen this in other clues) and 'o' is located in the answer.
'midday' could be 'n' (abbreviation for noon) and 'n' is present in the answer.
The remaining letters 'leave' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for on leave that I've seen before include "Officially excused from duty" , "Not required for work" , "Having an official holiday from work" , "Excused from work" , "Currently away from work" .)