Shot phaser suppressing power, maybe (7)
I believe the answer is:
perhaps
'maybe' is the definition.
('perhaps' can be a synonym of 'maybe')
'shot phaser suppressing power' is the wordplay.
'shot' is an anagram indicator.
'suppressing' is an insertion indicator.
'power' becomes 'p'.
'phaser' with letters rearranged gives 'perhas'.
'perhas' going around 'p' is 'PERHAPS'.
(Other definitions for perhaps that I've seen before include "Not necessarily" , "Quite possibly" , "Possibly but not certainly" , "Possibly, maybe" , "Conceivably" .)