Judge's former exercises in front of court (6)
I believe the answer is:
expect
'judge's' is the definition.
(expecting is a kind of judging)
'former exercises in front of court' is the wordplay.
'former' becomes 'ex' (prefix meaning former or onetime).
'exercises' becomes 'pe' (Physical Education).
'in front of' means one lot of letters go next to another (some letters go in front of others).
'court' becomes 'ct' (abbreviation used in road names).
'ex'+'pe'+'ct'='EXPECT'
(Other definitions for expect that I've seen before include "Be waiting for" , "Assume or look forward to" , "Be ready for" , "Require as rightfully due" , "Regard (something) as likely to happen" .)