44a Sad, cries, failing to get title role (8) ?R?????A
42d Reclines uneasily in part of car (8) ?????C?R
49d Exult as colonel finally spikes attack (5) ??O?T
49a Decorative boughs without much colour that Frenchman cuts back (8) ????N?R?
44a Cressida (anagram of sad+cries)
42d silencer (anagram)
49d gloat = l (last letter of colonel) inside of goat (attack)
49a greenery grey (without much colour) with Rene (frenchman) backwards inside