Source : Webster's Revised Unabridged Dictionary (1913)

Tailor \Tai"lor\, v. i. [imp. & p. p. {Tailored}; p. pr. & vb.
   n. {Tailoring}.]
   To practice making men's clothes; to follow the business of a
   tailor.

         These tailoring artists for our lays Invent cramped
         rules.                                   --M. Green.

Tailoring \Tai"lor*ing\, adv.
   The business or the work of a tailor or a tailoress.

Source : WordNet®

tailoring
     n : the occupation of a tailor