Misbehaving peer loves to have a lie-in (9)
I believe the answer is:
oversleep
'have a lie-in' is the definition.
(sleep in late)
'misbehaving peer loves' is the wordplay.
'misbehaving' is an anagram indicator.
'peer'+'loves'='peerloves'
'peerloves' is an anagram of 'OVERSLEEP'.
'to' is the link.
(Other definitions for oversleep that I've seen before include "not be able to get up" , "miss breakfast?" , "entranced too long" , "Fail to hear alarm clock?" , "rest too long?" .)