Verily, each comes to a sticky end! (3)
I believe the answer is:
yea
'verily' is the definition.
(I've seen this before)
'each comes to a sticky end' is the wordplay.
I cannot really see how this works, but
'each' could be 'ea' and 'ea' is found within the answer.
A single letter 'y' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for yea that I've seen before include "Aye; aye (anag.)" , "Affirmative, colloquially" , "Certainly (archaic)" , "I'm pro" , "Archaic affirmative answer" .)