Same rearguard manoeuvre - that's sweet (8,5)
I believe the answer is:
demerara sugar
'sweet' is the definition.
I know nothing about this answer so I can't tell whether this works.
'same rearguard manoeuvre' is the wordplay.
'manoeuvre' indicates anagramming the letters.
'same'+'rearguard'='samerearguard'
'samerearguard' is an anagram of 'DEMERARA SUGAR'.
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for demerara sugar that I've seen before include "plantation crop" , "Light brown sweetener, originally from Guyana" , "Brown sweetener from Caribbean" , "Cane product" .)