Not mass-produced
'not mass-produced' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tailormade that I've seen before include "Custom-built" , "with precision design?" .)
(Other definitions for handmade that I've seen before include "no machine involved" , "Personally developed" , "superior wear" , "Not generated by machine" , "Not manufactured by machine" .)