Using one's life to fish around head of Valentia Island (6)
I believe the answer is:
living
'using one's life' is the definition.
I can't judge whether this definition defines the answer.
'fish around head of valentia island' is the wordplay.
'fish' becomes 'ling' (ling is a kind of fish).
'around' indicates putting letters inside.
'head of' indicates taking the first letters.
The first letters of 'valentia island' is 'vi'.
'ling' enclosing 'vi' is 'LIVING'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for living that I've seen before include "Alive, income" , "Extant" , "Clergyman's benefice" , "Existing" , "19 of London, or 25 of Africa?" .)