Being in minor gas disruption? (8)
I believe the answer is:
organism
'being' is the definition.
(I know that being can be written as organism)
'minor gas disruption?' is the wordplay.
'disruption?' is an anagram indicator (I've seen 'disruption' mean this).
'minor'+'gas'='minorgas'
'minorgas' with letters rearranged gives 'ORGANISM'.
'in' acts as a link.
(Other definitions for organism that I've seen before include "Individual life form" , "Living animal or vegetable" , "Any living entity" , "Something alive" , "Living animal or plant" .)