Possible Clues:

• What doctor's do
• Of wound, mend and get better
• Get sound 3 down this (4)
• The man has a long lead to recover
• Well, get the sound of 31 across
• ''Physician, ___ thyself''
• Well, that will make one go on foot, by the sound of it
• Close up, as a wound
• Time can do it
• You'd get better to go on foot, by the sound of it