Current West End performance (3)

I believe the answer is:

act

'performance' is the definition.
(act is a kind of performance)

'current west end' is the wordplay.
'current' becomes 'ac' (alternating current).
'end' says to take the final letters.
The last letter of 'west' is 't'.
'ac'+'t'='ACT'

(Other definitions for act that I've seen before include "Take part in a play" , "Parliamentary decree" , "Start of a drama" , "Major division of play" , "Feign" .)

I've seen this clue in the Evening Standard.

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