Very popular electronic video service that was shut down (4)
I believe the answer is:
vine
'video service that was shut down' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'very popular electronic' is the wordplay.
'very' becomes 'v' (common abbreviation).
'popular' becomes 'in' ('in' can mean trendy).
'electronic' becomes 'e' (as in e-mail or e-books).
'v'+'in'+'e'='VINE'
Can you help me to learn more?
(Other definitions for vine that I've seen before include "Source of the grape" , "Bearer of grape" , "Plant bearing grapes" , "Climbing or trailing plant" , "Climber - creeper" .)