Old horse-drawn carriage ruined our beach (8)
I believe the answer is:
barouche
'old horse-drawn carriage' is the definition.
'barouche' can be an answer for 'carriage' (barouche is a kind of carriage). I am not certain of the 'old horse-drawn' bit.
'ruined our beach' is the wordplay.
'ruined' is an anagram indicator.
'our'+'beach'='ourbeach'
'ourbeach' is an anagram of 'BAROUCHE'.
Can you help me to learn more?
(Other definitions for barouche that I've seen before include "Horse-drawn carriage - Cuba hero (anag)" , "Four-wheeled carriage" , "Victorian carriage" .)