Crossword Genius

Grey cave at back of field (6)

Ross

I believe the answer is:

leaden

'grey' is the definition.
('leaden' can be a synonym of 'grey')

'cave at back of field' is the wordplay.
'cave' becomes 'den' (I've seen this before).
'at back of' says to put letters next to each other.
'field' becomes 'lea' (I've seen this before).
'den' after 'lea' is 'LEADEN'.

(Other definitions for leaden that I've seen before include "Depressing - heavy" , "Gloomy - slow-moving" , "Describes grey overcast skies" , "Heavy - overcast" , "Leaned over in slow, heavy way" .)

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