The chap's flipping rubbish and in charge? Great! (8)
I believe the answer is:
historic
'great' is the definition.
'the chap's flipping rubbish and in charge?' is the wordplay.
'the chap's' becomes 'his' (possessive pronoun for a male or 'chap').
'flipping' is a reversal indicator.
'rubbish' becomes 'rot' (I've seen this before).
'and' is a charade indicator (letters next to each other).
'in charge?' becomes 'ic'.
'rot' backwards is 'tor'.
'his'+'tor'+'ic'='HISTORIC'
(Other definitions for historic that I've seen before include "Connecting with old times" , "Significant" , "sort of present" , "Of significance in the past" , "Important and/or old" .)