Directions for making machine parts (8)
I believe the answer is:
bearings
'machine parts' is the definition.
(a bearing is a machine part used for rotation)
'directions for making' is the wordplay.
'directions' becomes 's' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'for' says to put letters next to each other (I've seen this in other clues).
'making' becomes 'bearing' (bearing is a kind of making).
's' put after 'bearing' is 'BEARINGS'.
(Other definitions for bearings that I've seen before include "Compass directions or small balls in wheel hubs" , "(Sense of) one's position or direction" , "specific location" , "Ivan -, Russian author" , "Direction relative to N." .)