Last drop of drama (7)

I believe the answer is:

curtain

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

This could be a double definition.

'last' is the first definition.
(thesaurus)

'drop of drama' is the second definition.
'curtain' can be an answer for 'drop' (thesaurus). I'm not certain of the 'of drama' bit.

Can you help me to learn more?

(Other definitions for curtain that I've seen before include "Window drape" , "Stage concealer" , "It can be drawn" , "Hanging material screen" , "Final instruction of play" .)

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

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