Still without gas? (7)
I believe the answer is:
airless
I believe this is a double definition.
'still' is the first definition.
(I've seen this before)
'without gas?' is the second definition.
('gas' can be 'air' (thesaurus) so maybe 'without gas' can be ''airless')
(Other definitions for airless that I've seen before include "not a breath of wind" , "Not ventilated" , "Close" , "Unventilated" , "Stifling" .)