Answer framed by King when in US state (6)
I believe the answer is:
kansas
'us state' is the definition.
(I've seen this before)
'answer framed by king when' is the wordplay.
'answer' becomes 'ans' (abbreviation for answer).
'framed by' means one lot of letters goes inside another.
'king' becomes 'K' (abbreviation for king in chess).
'when' becomes 'as' (eg 'when I walked' means 'as I walked').
'k'+'as'='kas'
'ans' going inside 'kas' is 'KANSAS'.
'in' is the link.
(Other definitions for kansas that I've seen before include "American state, capital Topeka" , "US state, joined 1861" , "Central US state" , "seen about in region round Topeka" , "State of central USA" .)