Want day at ground (6)
I believe the answer is:
dearth
'want' is the definition.
(both can mean a lack or scarcity)
'day at ground' is the wordplay.
'day' becomes 'd' (abbreviation for day).
'at' is a charade indicator (letters next to each other).
'ground' becomes 'earth' (synonyms).
'd'+'earth'='DEARTH'
(Other definitions for dearth that I've seen before include "poverty" , "Scarcity of thread" , "Acute shortage" , "Severe shortage" , "From shortage of food" .)