Continue working in Town, on the tube (5)
I believe the answer is:
acton
'tube' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?
'continue working in town on' is the wordplay.
'continue' becomes 'on' (I've seen this in other clues).
'working in town' becomes 'act' (I can't explain this - if you can you should give a lot more credence to this answer).
'on' says to put letters next to each other.
'on' put after 'act' is 'ACTON'.
'the' acts as a link.
Can you help me to learn more?
(Other definitions for acton that I've seen before include "English statesman" , "District of West London" , "London area" , "Gladstone's adviser" , "Respond in accordance with - London district" .)