Back-to-back felines inside so disconnected (8)
I believe the answer is:
staccato
'disconnected' is the definition.
(I know that disconnected can be written as staccato)
'back-to-back felines inside so' is the wordplay.
'back' shows that the letters should be reversed in order.
'to-back' becomes 'tac' (I am not sure about this - if you are sure you should believe this answer much more).
'felines' becomes 'cats' (cat is a kind of feline).
'inside' indicates the central letters.
'so' becomes 'too' (synonyms).
The centre of 'too' is 'o'.
'tac'+'cats'='taccats'
'taccats' written backwards gives 'staccat'.
'staccat'+'o'='STACCATO'
Can you help me to learn more?
(Other definitions for staccato that I've seen before include "instruction to musicians" , "In short bursts" , "Ghost" , "With notes short and separated (music)" , "with snappy sounds" .)