Put back into position of some harness, say (9)
I believe the answer is:
reinstate
'put back' is the definition.
(to reinstate is to return or restore)
'harness say' is the wordplay.
'harness' becomes 'rein' (synonyms).
'say' becomes 'state' (synonyms).
'rein'+'state'='REINSTATE'
'into position of some' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for reinstate that I've seen before include "Bring back" , "Restore to former post" , "Restore to previous position" , "Re-establish" , "Put back into office" .)