Raises end casually to show its fully prepared state (9)
I believe the answer is:
readiness
'prepared state' is the definition.
(I've seen this before)
'raises end casually' is the wordplay.
'casually' indicates an anagram (a casual or disordered version of the letters).
'raises'+'end'='raisesend'
'raisesend' with letters rearranged gives 'READINESS'.
'to show its fully' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for readiness that I've seen before include "Immediate availability" , "Inclination" , "Promptitude" , "initiative" , "State of being prepared and willing" .)