24a Something badly done has friend appearing for trial
COCK-UP
26a. Taking care always to be in the right great
DRESSY
4d. Support of Knights for series of contests?
CHAMPIONSHIP
17d. Crown left in ship's tender
PINNACLE
1a. Unyielding like an enterprise led by Napoleon?
PIG-HEADED
11a. Graves he provides are situated between two rivers
SOMMELIER
22a. Fitting groups in shelters
NESTS
24a. Looking ill but translating Livy with pronounced ease
EVIL EYE
25a. Measure in which two people proverbially co-operate
TANGO
28a. One keeps crossing oneself, taking such a bold leap
ENTRECHAT
16a. Change dress
SHIFT
17a. Say nothing in police stations
NICKS
Parses for the above please.