Crossword Genius

Dream location maybe, where you only get green lights? (4,2,3)

Ross

I believe the answer is:

land of nod

'dream location maybe' is the definition.
('in the Land of Nod' can mean asleep)

'you only get green lights?' is the wordplay.
I cannot quite see how this works, but
'get' could be 'land' (landing is a kind of getting) and 'land' is present in the answer.
This explanation may well be incorrect...

'where' acts as a link.

(Other definitions for land of nod that I've seen before include "Dropping-off place" , "Where Cain was banished after killing Abel" , "east of 27 [EDEN]" , "Where a murderer took refuge" , "Imaginary place of sleep" .)

I've seen this clue in The Times.
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