Man following us back for sweet (6)
I believe the answer is:
sugary
'for sweet' is the definition.
(similar in meaning)
'man following us back' is the wordplay.
'man' becomes 'gary' ().
'following' is a charade indicator (letters next to each other).
'back' is a reversal indicator.
'us' back-to-front is 'su'.
'gary' put after 'su' is 'SUGARY'.
(Other definitions for sugary that I've seen before include "Sweet, perhaps too much so" , "Excessively sweet or saccharine" , "Excessively sentimental" , "Sweet, syrupy" , "Over-sentimental" .)