A player has the right to clear space. That can even be done with the elbows. Tina Charles was great at it. But they don't have the right to elbow another player in the face in the act of clearing space.
Some pertinent info from the rules book. I think the officials got it right.
Art. 7. The following shall be considered excessive swinging:
a. When arm(s) and elbow(s) are swung about while using the shoulders as
pivots, and the speed of the extended arm(s) and elbow(s) exceeds that of
the rest of the body as it rotates on the hips or on the pivot foot; or
b. When the speed and vigor with which the arm(s) and elbow(s) are swung
is such that injury could result if another player were contacted.
Definitions. 4-29.2.c.6. In summary, contact with an elbow that occurs above the
shoulders of an opponent when the elbows are not swung excessively per 4-36.7.a
is a flagrant 1 personal foul and results in two free throws and the ball awarded to
the offended team (2010-2011 rule change).
Officials and Their Duties. 2-13.2.d.1.b. A coach may request a monitor
review to determine if any of the fouls in 2-13.2.d.1 occurred. When no such foul
is assessed, a timeout shall be charged to that team
Flagrant 1 or Flagrant 2 Fouls for Elbow Contact
Officials are reminded that there can be incidental contact with the elbow above
or below the shoulders; swinging of the elbow is required for the foul to be
classified as a flagrant 1 or 2 foul. Some incidental contact is being penalized
improperly.
d. Flagrant 2 personal foul. A flagrant 2 personal foul shall be a personal
foul that involves contact with an opponent that is not only excessive, but
also severe or extreme while the ball is live.