Objects to special police force turning up after lunchtime (5)
I believe the answer is:
items
'objects' is the definition.
'special police force turning up after lunchtime' is the wordplay.
'special' becomes 's' (common abbreviation as in Special Air Service).
'police force' becomes 'met' (short for Metropolitan Police Service).
'turning up' is a reversal indicator.
'after' is a charade indicator (letters next to each other).
'lunchtime' becomes 'i' (1pm could be I on a clock with Roman numerals).
's'+'met'='smet'
'smet' backwards is 'tems'.
'tems' after 'i' is 'ITEMS'.
'to' acts as a link.
(Other definitions for items that I've seen before include "Bits of news" , "partners" , "Articles or units on a list" , "Smite (anag)" , "Individual articles" .)