Overcome with locusts regularly at party (5)
I believe the answer is:
outdo
'overcome' is the definition.
(I know that outdo is a type of beat)
'locusts regularly at party' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'at' says to put letters next to each other.
'party' becomes 'do' (do is a kind of party).
The alternate letters of 'locusts' are 'out'.
'out'+'do'='OUTDO'
'with' is the link.
(Other definitions for outdo that I've seen before include "Surpass - overshadow - excel" , "Go one beter than, surpass" , "Exceed" , "Eclipse" , "Perform better than (someone)" .)