Police officers need company for dance (5)
I believe the answer is:
disco
'for dance' is the definition.
(disco can mean a dance event)
'police officers need company' is the wordplay.
'police officers' becomes 'DIs' (detective inspectors).
'need' means one lot of letters go next to another.
'company' becomes 'co' (abbreviation).
'dis'+'co'='DISCO'
(Other definitions for disco that I've seen before include "Club with dancing to recorded music" , "Dance club with recorded music" , "Type of music" , "Discotheque (abbrev.)" , "Musical entertainment" .)