Sister embracing style of music that is more spirited (8)

I believe the answer is:

spunkier

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

'more spirited' is the definition.
(I've seen this in another clue)

'sister embracing style of music that is' is the wordplay.
'sister' becomes 'sr' (abbreviation as in names of nuns).
'embracing' is an insertion indicator.
'style of music' becomes 'punk' (I can't justify this - if you can you should believe this answer much more).
'that is' becomes 'ie' (short for Latin 'id est', 'that is').
'punk'+'ie'='punkie'
'sr' placed around 'punkie' is 'SPUNKIER'.

Can you help me to learn more?

I've seen this clue in The Independent.

Want a hint initially instead of a full solution? Install my app