Overturned position is for exercise (3-2)
I believe the answer is:
sit-up
'exercise' is the definition.
(I've seen this before)
'overturned position is' is the wordplay.
'overturned' shows that the letters should be reversed in order.
'position' becomes 'put' (synonyms).
'put'+'is'='putis'
'putis' backwards is 'SIT-UP'.
'for' is the link.
(Other definitions for sit-up that I've seen before include "Physical exercise" , "Exercise done on the floor" , "Exercise designed to strengthen stomach muscles" .)