Get basic new bra with no restraints, it's more comfortable (6)
I believe the answer is:
easier
'more comfortable' is the definition.
('easy' can be similar in meaning to 'comfortable')
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for easier that I've seen before include "More simple" , "Simpler" , "Less complicated" , "Less taxing" , "More facile" .)