Used primarily to hang, put in inverted position (5)
I believe the answer is:
upend
'position' is the definition.
(I know that upend is a kind of position)
'used primarily to hang' is the wordplay.
'primarily' suggests taking the first letters.
'to hang' becomes 'pend' (I've seen this before).
The initial letter of 'used' is 'u'.
'u'+'pend'='UPEND'
'put in inverted' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for upend that I've seen before include "Tip right over" , "Knock over" , "change things drastically" , "Overturn" , "Topple" .)