Ballet position found to be tricky (5)
I believe the answer is:
fondu
'ballet position' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'found to be tricky' is the wordplay.
'to be tricky' indicates anagramming the letters.
'found' with letters rearranged gives 'FONDU'.
Can you help me to learn more?
(Other definitions for fondu that I've seen before include "Dish of melted food" , "Ballet position sounds like a dipping dish?" , "Dish featuring melted sauce" .)