Crossword Genius

One representing, for a long time, a theatre? (5)

Ross

I believe the answer is:

agent

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

'one representing' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'long time a theatre?' is the wordplay.
'long time' becomes 'age' (an age is a period of time).
'a theatre?' becomes 'NT' (National Theatre).
'age'+'nt'='AGENT'

'for a' is the link.

Can you help me to learn more?

(Other definitions for agent that I've seen before include "envoy" , "Spy - broker" , "Spy; representative" , "Author" , "Performer's manager" .)

I've seen this clue in the Evening Standard.
Want a hint initially instead of a full solution? Install my app