Hi rocheman. this is driving me mad, so i looked online for the xword.
19 Search that is about name for syndicate (7)
combine
comb + iNe (N[ame] inside ie [that is]
this now gives a 'M' for the 3rd letter.
I totally agree with the 'S' but could not work out 22d to confirm the 'O'
Hope this helps.