Doctor crashed a party game (8)
I believe the answer is:
charades
'party game' is the definition.
(I've seen this before)
'doctor crashed a' is the wordplay.
'doctor' indicates an anagram.
'crashed'+'a'='crasheda'
'crasheda' anagrammed gives 'CHARADES'.
(Other definitions for charades that I've seen before include "Games like this" , "Game in which answers are acted out" , "Miming games" , "Guessing game where words are acted out" , "Miming parlour game" .)