Swans around island with trendy talent for writing (10)
I believe the answer is:
penmanship
'writing' is the definition.
(I know that penmanship is a type of writing)
'swans around island with trendy talent' is the wordplay.
'swans' becomes 'pens' (pen can mean a female swan).
'around' is an insertion indicator.
'island' becomes 'Man' (the Isle of Man is an example).
'with trendy talent' becomes 'hip' (I can't justify this - if you can you should believe this answer much more).
'pens' enclosing 'man' is 'penmans'.
'penmans'+'hip'='PENMANSHIP'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for penmanship that I've seen before include "Writing skill" , "Skill in handwriting" , "Calligraphy" , "hand" .)