When going round central Tokyo, I drink this? (4)

I believe the answer is:

saki

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'drink this?' is the definition.
The definition suggests a singular noun which matches the answer.

'when going round central tokyo i' is the wordplay.
'when' becomes 'as' (eg 'when I walked' means 'as I walked').
'going round' says the letters should be written in reverse.
'central' says to take the centre.
The middle letter of 'tokyo' is 'k'.
'as' in reverse letter order is 'sa'.
'sa'+'k'+'i'='SAKI'

Can you help me to learn more?

(Other definitions for saki that I've seen before include "Monkey; author's pen name" , "Pen name of short story writer, H.H. Munro, d. 1916" , "Author H. H. Munro's pseudonym" , "author chosen by 29" , "Scottish writer" .)

I've seen this clue in The Independent.

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