Good dance party given by police in cemetery (9)
I believe the answer is:
graveyard
'cemetery' is the definition.
(I know that cemetery can be written as graveyard)
'good dance party given by police' is the wordplay.
'good' becomes 'g' (abbreviation).
'dance party' becomes 'rave' (rave is a type of dance event).
'given by' says to put letters next to each other.
'police' becomes 'Yard' (Scotland Yard, Metropolitan Police HQ).
'g'+'rave'+'yard'='GRAVEYARD'
'in' acts as a link.
(Other definitions for graveyard that I've seen before include "Burial ground" , "Cemetery" , "remains here" , "Final destination" , "'God's acre'" .)