Tomb no good for dancing event (4)
I believe the answer is:
rave
'dancing event' is the definition.
(type of dance night)
'tomb no good' is the wordplay.
'tomb' becomes 'grave' (synonyms).
'no' suggests deleting specific letters.
'good' becomes 'g' (abbreviation).
'grave' with 'g' taken away is 'RAVE'.
'for' acts as a link.
(Other definitions for rave that I've seen before include "Party with electronic dance music - be wild" , "Talk wildly, rant" , "Fume" , "Lively party" , "Rant about an all-night dance party?" .)