We linger about at all events (7)
I believe the answer is:
however
'at all events' is the definition.
(I've seen this before)
'we linger about' is the wordplay.
'linger' becomes 'hover' (synonyms).
'about' is an insertion indicator.
'we' put within 'hover' is 'HOWEVER'.
(Other definitions for however that I've seen before include "On the other hand" , "still" , "Notwithstanding" , "at the same time" , "In whatever way" .)