Engagement’s beginning with flash rock (3)
I believe the answer is:
emo
'rock' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'engagement's beginning with flash' is the wordplay.
'beginning' says to take the initial letters.
'with' says to put letters next to each other.
'flash' becomes 'mo' (both mean a very short period of time).
The initial letter of 'engagements' is 'e'.
'e'+'mo'='EMO'
Can you help me to learn more?
(Other definitions for emo that I've seen before include "Town and Court in Laois" , "music?" , "Serious type of rock" .)