One Mr Bad also awaiting trial (2,6)
I believe the answer is:
on remand
'awaiting trial' is the definition.
(I've seen this before)
'one mr bad also' is the wordplay.
'bad' is an anagram indicator.
'also' becomes 'and' (I've seen this before).
'one'+'mr'='onemr'
'onemr' is an anagram of 'onrem'.
'onrem'+'and'='ON REMAND'
(Other definitions for on remand that I've seen before include "Awaiting trial" , "Demon ran wild, being held in custody pending trial" , "yet untried" , "Status of some prisoners" , "Having been sent back into custody" .)