One walking along composing porn? Dear me! (10)

I believe the answer is:

promenader

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

'one walking along' is the definition.
The definition suggests a singular noun which matches the answer.

'composing porn? dear me' is the wordplay.
'composing' is an anagram indicator.
'porn'+'dear'+'me'='porndearme'
'porndearme' anagrammed gives 'PROMENADER'.

Can you help me to learn more?

(Other definitions for promenader that I've seen before include "One may join in Rule Britannia" , "Royal Albert Hall regular" , "she saunters about" , "Walker - concert goer" .)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app