Gangster admits tipping off many an individual from estate (6)
I believe the answer is:
domain
'estate' is the definition.
(I've seen this before)
'gangster admits tipping off many an individual' is the wordplay.
'gangster' becomes 'dn' (I can't justify this - if you can you should give a lot more credence to this answer).
'admits' is an insertion indicator.
'tipping' indicates taking the first letters (I've seen 'tip of' mean this).
The initial letters of 'off many an individual' is 'omai'.
'dn' enclosing 'omai' is 'DOMAIN'.
'from' is the link.
Can you help me to learn more?
(Other definitions for domain that I've seen before include "Range of influence or field of activity" , "Area under someone's control, field of activity" , "Field of thought or activity" , "District or area - or range of influence" , "Territory over which someone reigns" .)