Suggested mischievous child told fibs (7)
I believe the answer is:
implied
'suggested' is the definition.
(implying is a kind of suggesting)
'mischievous child told fibs' is the wordplay.
'mischievous child' becomes 'imp' (I've seen this before).
'told fibs' becomes 'lied' (I've seen this before).
'imp'+'lied'='IMPLIED'
(Other definitions for implied that I've seen before include "Indicated by suggestion" , "Insinuated, hinted" , "I limped in hinted or suggested way" , "Stated indirectly" , "State indirectly" .)