Top style musical party (6)

I believe the answer is:

hairdo

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

'top style' is the definition.
'hairdo' can be an answer for 'style' (I've seen this before). I'm unsure of the 'top' bit.

'musical party' is the wordplay.
'musical' becomes 'hair' (I've seen this before).
'party' becomes 'do' (do is a kind of party).
'hair'+'do'='HAIRDO'

Can you help me to learn more?

(Other definitions for hairdo that I've seen before include "What one may have expected from 'Sweeney Todd'" , "Possibly a DA" , "Style for one's crowning glory" , "The process of styling head growth" , "Say, crew cut" .)

I've seen this clue in The Guardian and The Globe and Mail.

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