Released, fixed price about right (3,4)
I believe the answer is:
set free
'released' is the definition.
(I've seen this before)
'fixed price about right' is the wordplay.
'fixed' becomes 'set' ('set' can be a synonym of 'fixed'**).
'price' becomes 'fee' (I've seen this before).
'about' indicates putting letters inside.
'right' becomes 'r' (common abbreviation).
'fee' enclosing 'r' is 'free'.
'set'+'free'='SET FREE'
(Other definitions for set free that I've seen before include "Released" , "Liberate" , "Deliver - release" , "Clear" , "Uncaged birds have been" .)