Count said to be disguised as caretaker (9)
I believe the answer is:
custodian
'caretaker' is the definition.
(I've seen this in another clue)
'count said to be disguised' is the wordplay.
'to be disguised' is an anagram indicator.
'count'+'said'='countsaid'
'countsaid' anagrammed gives 'CUSTODIAN'.
'as' acts as a link.
(Other definitions for custodian that I've seen before include "Protector" , "One takes care of" , "Guardian" , "Protector/guardian (of something)" , "museum keeper" .)