Taser which is initially fired into one getting tanned (7)
I believe the answer is:
stunner
'initially fired into one getting tanned' is the definition.
I can't judge whether this definition defines the answer.
'taser which' is the wordplay.
'taser' becomes 'stun ' (I've seen this before).
'which' becomes 'ner' (I can't justify this - if you can you should believe this answer much more).
'stun'+'ner'='STUNNER'
'is' is the link.
Can you help me to learn more?
(Other definitions for stunner that I've seen before include "Very attractive girl" , "Amazing turn of events (colloq.)" , "Attractive person" , "Powerful punch" , "Good-looker (informal)" .)