Enthusiasts taking floor up (4)
I believe the answer is:
nuts
'enthusiasts' is the definition.
The answer and definition can be both people as well as being plural nouns.
Maybe they are linked in a way I don't understand?
'floor up' is the wordplay.
'floor' becomes 'stun' (synonyms).
'up' shows that the letters should be reversed in order (in down clue: letters go upwards).
'stun' written backwards gives 'NUTS'.
'taking' acts as a link.
Can you help me to learn more?
(Other definitions for nuts that I've seen before include "Fruits; insane" , "Heads - fans - fruit" , "Fruit - bananas!" , "Is butter" , "Mad - hard fruits" .)