Needless bother (4)
'needless bother' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ado that I've seen before include "Flurry" , "puff ball!" , "agitation" , "stir" , "Fuss, trouble" .)
(Other definitions for fuss that I've seen before include "Hoo-ha" , "Protest -- excitement" , "Commotion; ado" , "trouble" , "Bustle and bother" .)