Unexpectedly called in a casual involvement (9)
I believe the answer is:
dalliance
'casual involvement' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'unexpectedly called in a' is the wordplay.
'unexpectedly' is an anagram indicator.
'called'+'in'+'a'='calledina'
'calledina' anagrammed gives 'DALLIANCE'.
Can you help me to learn more?
(Other definitions for dalliance that I've seen before include "Dawdling" , "Flirtation" , "time-wasting action" , "Fling" , "Playing" .)