Second verse able at last to stir emotions (4)
I believe the answer is:
move
'stir emotions' is the definition.
(I've seen this before)
'second verse able at last' is the wordplay.
'second' becomes 'mo' (both are short periods of time).
'verse' becomes 'v'.
'at last' indicates one should take the final letters.
The final letter of 'able' is 'e'.
'mo'+'v'+'e'='MOVE'
'to' acts as a link.
(Other definitions for move that I've seen before include "Travel - propose" , "Depart" , "Change (house)" , "Affect" , "Stir emotions" .)