Search inside disco, urgently (5)
I believe the answer is:
scour
'search' is the definition.
(I know that scour is a kind of search)
'inside disco urgently' is the wordplay.
'inside' indicates the answer is hidden within the clue.
'SCOUR' is hidden within 'disco urgently'.
(Other definitions for scour that I've seen before include "search in detail" , "Clean by abrasion" , "Hunt through" , "Clean by hard rubbing" , "Rub hard or search thoroughly" .)