Kept an eye on flounder over beds (8)
I believe the answer is:
observed
'kept an eye on' is the definition.
('observe' can be a synonym of 'keep an eye on')
'flounder over beds' is the wordplay.
'flounder' is an anagram indicator.
'over'+'beds'='overbeds'
'overbeds' is an anagram of 'OBSERVED'.
(Other definitions for observed that I've seen before include "Noticed or followed the rules" , "with witnesses" , "Abided by, rules say" , "Kept an eye on" , "saw" .)