Time to order something small (4)
I believe the answer is:
mite
'something small' is the definition.
(I've seen this in another clue)
'time to order' is the wordplay.
'to order' indicates an anagram.
'time' anagrammed gives 'MITE'.
(Other definitions for mite that I've seen before include "Tiny contribution, child" , "Tiny creature found in food" , "Very small creature or child" , "Microscopic animal" , "Minute arachnid" .)