Keeps going with bogus SAS units (8)
I believe the answer is:
sustains
'keeps going' is the definition.
(I've seen this before)
'bogus sas units' is the wordplay.
'bogus' is an anagram indicator (a false or bogus form of the letters).
'sas'+'units'='sasunits'
'sasunits' is an anagram of 'SUSTAINS'.
'with' is the link.
(Other definitions for sustains that I've seen before include "Provides with nourishment" , "keeps going" , "Supports, keeps alive" , "Nourishes or bolsters" , "Bears" .)