Suitable part removed from contraption (3)
I believe the answer is:
apt
'suitable' is the definition.
(apt means appropriate or fitting)
'part removed from contraption' is the wordplay.
'APT' is hidden within the letters.
However, I'm uncertain how this is indicated.
Can you help me to learn more?
(Other definitions for apt that I've seen before include "flat" , "Prone" , "Train" , "To the point" , "Tap (anag.)" .)