Princess's hubby let loose to destroy? (9)
I believe the answer is:
dismantle
'destroy?' is the definition.
(I know that dismantle is a more specific form of destroy)
'princess's hubby let loose' is the wordplay.
'princess's hubby' becomes 'disman' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'loose' is an anagram indicator (letters are loosened from their original positions).
'let' with letters rearranged gives 'tle'.
'disman'+'tle'='DISMANTLE'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for dismantle that I've seen before include "To demolish" , "Take to pieces" , "Undo" , "Unrig" , "strike" .)