Devotee has shown a proficiency at judo and energy for dance (8)
I believe the answer is:
fandango
'dance' is the definition.
(fandango is a kind of dance)
'devotee has shown a proficiency at judo and energy' is the wordplay.
I cannot quite understand how this works, but
'devotee' could be 'fan' ('fan' can be a synonym of 'devotee') and 'fan' is present in the answer.
'a' could be 'an' and 'an' is located in the answer.
'energy' could be 'go' (I've seen this in other clues) and 'go' is found within the answer.
A single letter 'd' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
'for' is the link.
Can you help me to learn more?
(Other definitions for fandango that I've seen before include "Dance performed with castanets" , "Lively Spanish dance" , "Old Spanish dance in triple time" , "Spanish courtship dance in triple time" , "Spanish Steps" .)