Exaggerates how Rover damaged the seat jumping on it (9)
I believe the answer is:
overrates
'exaggerates' is the definition.
Although both the answer and definition are verbs in their -s form, I cannot see how they can define each other.
'rover damaged the seat jumping on it' is the wordplay.
'damaged' indicates anagramming the letters.
'jumping' indicates anagramming the letters.
'on it' is a charade indicator (letters next to each other).
'rover' with letters rearranged gives 'overr'.
'seat' with letters rearranged gives 'ates'.
'overr'+'ates'='OVERRATES'
'how' acts as a link.
Can you help me to learn more?
(Other definitions for overrates that I've seen before include "Makes too high an estimate" , "Values too highly" .)