Flash couples embracing the core of activist's causes (7)
I believe the answer is:
motives
'causes' is the definition.
The definition and answer can be both related to communication as well as being plural nouns.
Maybe they are linked in a way I don't understand?
'flash couples embracing the core of activist's' is the wordplay.
'flash' becomes 'mo' (both mean a very short period of time).
'couples' becomes 'ties' (couple can mean to link or tie).
'embracing' means one lot of letters goes inside another.
'the core of' says to take the centre.
The central letter of 'activists' is 'v'.
'ties' going around 'v' is 'tives'.
'mo'+'tives'='MOTIVES'
Can you help me to learn more?
(Other definitions for motives that I've seen before include "Reasons for action" , "They're why" , "inducements" .)