Some scotch a piece of theatre (5)

I believe the answer is:

drama

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

'piece of theatre' is the definition.
'drama' can be an answer for 'theatre' (I've seen this before). I'm unsure of the 'piece of' bit.

'some scotch a' is the wordplay.
'some scotch' becomes 'dram' (I have seen 'Small Scotch' mean 'dram' so perhaps 'scotch' could also mean 'dram').
'dram'+'a'='DRAMA'

Can you help me to learn more?

(Other definitions for drama that I've seen before include "Acting" , "Stage production" , "Tragic situation" , "Work to be performed by actors" , "show of histrionics" .)

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

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