Sad teen touring part of London (7)

I believe the answer is:

eastend

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'part of london' is the definition.
'eastend' can be an answer for 'part' (I have seen 'Part of capital' mean 'eastend' so perhaps 'part' could also mean 'eastend'). I'm not sure about the 'of london' bit.

'sad teen touring' is the wordplay.
'touring' indicates an anagram (letters move or tour around).
'sad'+'teen'='sadteen'
'sadteen' is an anagram of 'EASTEND'.

Can you help me to learn more?

(Other definitions for eastend that I've seen before include "Part of capital" , "yet not 17 [ORIENTAL], oddly" .)

I've seen this clue in The Irish Times.

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