Violins initially tuned well for loud little spins (8)

'violins' is the definition.
Although both the answer and definition are plural nouns, I can't understand how one could define the other.

'initially tuned well for loud little spins' is the wordplay.
'initially' suggests taking the first letters.
'well for loud' becomes 'widdle' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'little' suggests taking the first letters.
The first letter of 'tuned' is 't'.
The initial letter of 'spins' is 's'.
't'+'widdle'+'s'='TWIDDLES'

Can you help me to learn more?