The word "radar" is not necessary when referring to headings. You won't find it in any of our unit instructions.
"ABC123 fly heading 075"
"Fly heading 075 ABC123"
Straightforward.
For those who prefer to clog up the RT you may hear "ABC123 make your present heading a radar heading" What they should be saying is "ABC123 continue present heading".
My 2p worth...