Like deserts, several lacking sun (3)
I believe the answer is:
dry
'like deserts' is the definition.
'several lacking sun' is the wordplay.
'several' becomes 'sundry' (I've seen this before).
'lacking' is a deletion indicator.
'sundry' with 'sun' taken out is 'DRY'.
(Other definitions for dry that I've seen before include "Having given up drinking" , "Juiceless" , "Lacking moisture" , "(Of wine) not sweet" , "Formal" .)