Polite address (3 letters)

{ Answer }

SIR

{ Related Clues }

Bors, for one
"Dear" one
Dear one?
"To ___ with Love"
Bors or Gawain
Bors or Modred
British rank
Camelot title
Dear follower
Eden or Olivier
Gawain's title
Kay's title
K.B.E.'s title
Knightly title
Knight's title
Letter opener
Madam's counterpart
Military address
Title for a baronet
Title for Gawain
My dear man
Paul McCartney title
Preppie's word of address
Title Pinero had
Word said with a salute
"l am ___ Oracle . . . ": Shak.
Title Noël Coward held
___ Barton (first Triple Crown winner)

{ Tags }

address, dear, eg, held, knights, letter, love, madams, man, mccartney, my, opener, raleigh, round, sir, soltis, table, title, walter, word, yes

{ Notes }

The answer SIR is seen frequently, appearing about once every 50 puzzles.

{ Definition }

SIR as a noun:

1. term of address for a man

2. a title used before the name of knight or baronet