Specified key condition first (6)
I believe the answer is:
stated
'specified' is the definition.
(I've seen this in another clue)
'key condition first' is the wordplay.
'key' becomes 'd' (musical key).
'condition' becomes 'state' (the state something is in).
'first' says to put letters next to each other.
'd' after 'state' is 'STATED'.
(Other definitions for stated that I've seen before include "Clearly expressed" , "Declared as fact" , "Declared or asserted" , "Close-fitting; drunk" , "Asserted, affirmed" .)