Does no good when the old grey mare looks older still (7)
I believe the answer is:
damages
'does' is the definition.
Although both the answer and definition are verbs in their -s form, I can't understand how they can define each other.
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for damages that I've seen before include "Hurts" , "Moneys paid as compensation for an injury" , "Money awarded as compensation" , "Harms" , "Money paid in compensation for loss or injury" .)