Change where state's steady? (10)
I believe the answer is:
sweetheart
'steady?' is the definition.
('sweetheart' can be a synonym of 'steady')
'change where state's' is the wordplay.
'change' is an anagram indicator.
'where'+'state'='wherestate'
'wherestate' is an anagram of 'SWEETHEART'.
(Other definitions for sweetheart that I've seen before include "Love" , "baby" , "Steady!" , "boyfriend?" , "Juliet had one" .)