Counsel doorman to hold back a great deal (6)
I believe the answer is:
oodles
'a great deal' is the definition.
(I've seen this in another clue)
'counsel doorman to hold back' is the wordplay.
'to hold' says the answer is hidden in the clue (I've seen 'held' mean this).
'back' shows that the letters should be reversed in order.
'seldoo' can be found hidden inside 'counsel doorman'.
'seldoo' reversed gives 'OODLES'.
(Other definitions for oodles that I've seen before include "Plenty" , "Loosed among lots" , "Lashings, loads" , "a feast" , "A lot" .)