Convincing information in bed (6)
I believe the answer is:
cogent
'convincing' is the definition.
(similar in meaning)
'information in bed' is the wordplay.
'information' becomes 'gen' (gen can informally mean information).
'in' indicates putting letters inside.
'bed' becomes 'cot' (cot is a type of bed).
'gen' put within 'cot' is 'COGENT'.
(Other definitions for cogent that I've seen before include "Well-reasoned" , "Compelling (argument)" , "Convincing, persuasive" , "Convincingly argued" , "Strong" .)