More pliable or malleable (6)
I believe the answer is:
softer
'more pliable or malleable' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for softer that I've seen before include "Less hard, more malleable" , "Less hard, more yielding" , "Less firm, loud" , "More pliable or malleable" .)