Low-down type initiated contacts with former mistress? Nob (9)
I believe the answer is:
gentleman
'former mistress? nob' is the definition.
'gentleman' can be an answer for 'nob' (thesaurus). I'm not certain of the 'former mistress?' bit.
'low-down type initiated contacts' is the wordplay.
'low down' becomes 'gen' (both can mean information).
'initiated' indicates taking the first letters.
'contacts' becomes 'leman' (I am not sure about this - if you are sure you should believe this answer much more).
The first letter of 'type' is 't'.
'gen'+'t'+'leman'='GENTLEMAN'
'with' is the link.
Can you help me to learn more?
(Other definitions for gentleman that I've seen before include "Courteous chap" , "Courteous fellow" , "Male of refinement" , "trustworthy type" , "Toff" .)