Offering to conceal identity of person in charge (9)
I believe the answer is:
president
'person in charge' is the definition.
'offering to conceal identity' is the wordplay.
'offering' becomes 'present' (I've seen this before).
'to conceal' is an insertion indicator.
'identity' becomes 'id' (I've seen this in other clues).
'present' going around 'id' is 'PRESIDENT'.
'of' is the link.
(Other definitions for president that I've seen before include "Head of a republic - or a club" , "2's official title" , "top man" , "American leader" , "Trump, perhaps" .)