Performer using popular guitar action with talents I developed (15)

I believe the answer is:

instrumentalist

I'm a little stuck... Click here to teach me more about this clue!

'performer' is the definition.
(instrumentalist is a kind of performer)

'popular guitar action with talents i developed' is the wordplay.
'popular' becomes 'in' ('in' can mean trendy).
'guitar action' becomes 'strum' (I can't justify this - if you can you should give a lot more credence to this answer).
'with' is a charade indicator (letters next to each other).
'developed' indicates an anagram.
'talents'+'i'='talentsi'
'talentsi' is an anagram of 'entalist'.
'in'+'strum'+'entalist'='INSTRUMENTALIST'

'using' acts as a link.

Can you help me to learn more?

(Other definitions for instrumentalist that I've seen before include "oboe, perhaps" , "one of the band" , "musician" .)

I've seen this clue in The Telegraph.

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