One cutting confidential links leading to famous people (13)
I believe the answer is:
personalities
'famous people' is the definition.
(I've seen this before)
'one cutting confidential links' is the wordplay.
'one' becomes 'i' (Roman numeral).
'cutting' means one lot of letters goes inside another (some letters cut their way into a word).
'confidential' becomes 'personal' (I've seen this in another clue).
'links' becomes 'ties' (tie can mean a connection or link).
'personal'+'ties'='personalties'
'i' put into 'personalties' is 'PERSONALITIES'.
'leading to' acts as a link.
(Other definitions for personalities that I've seen before include "Celebrities" , "famous people" .)