Amenable lot confused routine enthusiast (11)
I believe the answer is:
balletomane
'routine enthusiast' is the definition.
'balletomane' can be an answer for 'enthusiast' (balletomane is a kind of enthusiast). I'm not sure about the 'routine' bit.
'amenable lot confused' is the wordplay.
'confused' indicates anagramming the letters.
'amenable'+'lot'='amenablelot'
'amenablelot' with letters rearranged gives 'BALLETOMANE'.
Can you help me to learn more?
(Another definition for balletomane that I've seen is " being wild about Giselle?".)