Instant message notification sound able ultimately to have an effect (7)
I believe the answer is:
impinge
'have an effect' is the definition.
(I've seen this in another clue)
'instant message notification sound able ultimately' is the wordplay.
'instant message' becomes 'im' (this could be a standard abbreviation I've not previously seen).
'notification sound' becomes 'ping' (I've seen this in another clue).
'ultimately' says to take the final letters.
The final letter of 'able' is 'e'.
'im'+'ping'+'e'='IMPINGE'
'to' is the link.
Can you help me to learn more?
(Other definitions for impinge that I've seen before include "Trespass (upon)" , "Encroach (upon)" , "Have an effect (upon)" , "Make an impact, encroach" , "Encroach - strike" .)