Have a double life in the Trafalgar Square area (3)
I believe the answer is:
are
'have a double life in' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'trafalgar square area' is the wordplay.
'ARE' is hidden within the letters.
But, I'm uncertain how this is indicated.
'the' is the link.
Can you help me to learn more?
(Other definitions for are that I've seen before include "Era (anag.)" , "Unit of land measure equal to 100 square metres" , "Is, in the plural" , "is for more than one" , "(They/you/we) exist" .)