Tube station guardian? (5)
I believe the answer is:
angel
This clue might be a double definition.
'tube station' is the first definition.
Both the answer and definition are singular nouns.
Maybe you can see a link between them that I can't see?
'guardian?' is the second definition.
(guardian angel)
Can you help me to learn more?
(Other definitions for angel that I've seen before include "Spiritual being - financial backer" , "Divine messenger" , "Heavenly being - 21 (anag)" , "One usually obliging" , "one might be recording" .)