Possible Clues:

• Champion with battered red nose
• Express approbation of last rose, perhaps
• Finish treatment for sore back
• The last of the last of the steed, as one may confirm (7)
• Back at last - steed wouldn't start
• Confirm that this is the last of the last of the steed
• Advocate has qualified at last in English Language
• Sign seen flashing, the stick-up goes through
• Confirm that this is the last of the last of the horse
• Close alternative points to sign