Paint I’m using for the big drums (7)

I believe the answer is:

timpani

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

'big drums' is the definition.
'timpani' can be an answer for 'drums' (type of drums). I am unsure of the 'big' bit.

'paint i'm using' is the wordplay.
'using' is an anagram indicator (the letters used in a different way).
'paint'+'im'='paintim'
'paintim' is an anagram of 'TIMPANI'.

'for the' is the link.

Can you help me to learn more?

(Other definitions for timpani that I've seen before include "Percussion section" , "Tina Pim has a set of kettle drums" , "PM, I ain't (anag.)" , "Set of kettledrums" , "orchestra members" .)

I've seen this clue in the Sydney Morning Herald.

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