Action of PM? He's flustered during upset (9)
I believe the answer is:
reshuffle
'action of pm?' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'he's flustered during upset' is the wordplay.
'flustered' is an anagram indicator.
'during' is an insertion indicator.
'upset' becomes 'ruffle' (ruffle can mean to upset or mess up).
'hes' anagrammed gives 'esh'.
'esh' inserted inside 'ruffle' is 'RESHUFFLE'.
Can you help me to learn more?
(Other definitions for reshuffle that I've seen before include "Recycle old cabinet" , "Change members of Government" , "PM's cabinet changes" , "Change of government jobs" , "Cabinet rearrangement" .)