Men going both ways holding front of this spinning device (5)
I believe the answer is:
rotor
'device' is the definition.
(rotor is a kind of device)
'men going both ways holding front of this spinning' is the wordplay.
I cannot really see how this works, but
'men' could be 'or' (Other Ranks: non-commissioned soldiers) and 'or' is found in the answer.
'of' could be 'o' and 'o' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for rotor that I've seen before include "one lifting chopper?" , "Revolving part of a motor" , "Device turning" , "System of turning helicopter blades" , "Dynamo part" .)