Dracula, perhaps, put on a cape, one in red or black? (7)
I believe the answer is:
account
'one in red or black?' is the definition.
(one's accounts may be in the red or in the black)
'dracula perhaps put on a cape' is the wordplay.
'dracula perhaps' becomes 'count' (Count Dracula).
'put on' says to put letters next to each other.
'cape' becomes 'c' (abbreviation used on maps).
'a'+'c'='ac'
'count' put after 'ac' is 'ACCOUNT'.
(Other definitions for account that I've seen before include "books" , "Bill; importance" , "Tell" , "Bank record" , "Bill; description" .)