T. Greig's men ordered spice (4,6)
I believe the answer is:
stem ginger
'spice' is the definition.
(I've seen this before)
't greig's men ordered' is the wordplay.
'ordered' indicates anagramming the letters.
't'+'greigs'+'men'='tgreigsmen'
'tgreigsmen' is an anagram of 'STEM GINGER'.
(Other definitions for stem ginger that I've seen before include "It's tasty" , "Crystallised root" , "Merging set (anag.)" , "spicy ingredient" , "sort of ice cream" .)