Island king into heavy metal and current pop (8)
I believe the answer is:
trinidad
'island' is the definition.
(Trinidad is an example)
'metal and current pop' is the wordplay.
'metal' becomes 'trin' (I am not sure about this - if you are sure you should believe this answer much more).
'and' says to put letters next to each other.
'current' becomes 'I' (symbol for electric current).
'pop' becomes 'dad' (both can mean one's father).
'trin'+'i'+'dad'='TRINIDAD'
'king into heavy' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for trinidad that I've seen before include "West Indian island paired with Tobago" , "English-speaking island off Venezuela" , "Caribbean island" , "West Indies island" , "W. I. island" .)