Indian garment is folded back around half of rear (4)
I believe the answer is:
sari
'indian garment' is the definition.
(I've seen this before)
'folded back around half of rear' is the wordplay.
'folded back around' becomes 'sa' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'half of' indicates taking half.
'rear' becomes 'rise' (synonyms).
'rise' halved is 'ri'.
'sa'+'ri'='SARI'
'is' is the link.
Can you help me to learn more?
(Other definitions for sari that I've seen before include "Traditional Indian garment" , "Indian robe" , "Something worn" , "Traditional dress of Indian women" , "South Asian garment (variant spelling)" .)