Old couple embracing in French outdoors (4,3)
I believe the answer is:
open air
'outdoors' is the definition.
('open air' can be a synonym of 'outdoors')
'old couple embracing in french' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'couple' becomes 'pair' ('pair' can be a synonym of 'couple').
'embracing' indicates putting letters inside.
'in french' becomes 'en' ('en' can be French for 'in' e.g. en France).
'pair' enclosing 'en' is 'penair'.
'o'+'penair'='OPEN-AIR'
(Other definitions for open air that I've seen before include "kind of concert" , "not doing covers?" , "Outside" , "Outdoors - with no cover" , "theatre" .)