Noisy disturbance caused by strange cat with no tail (6)
I believe the answer is:
rumpus
'noisy disturbance' is the definition.
(I've seen this before)
'strange cat with no tail' is the wordplay.
'strange' becomes 'rum' ('rum' can be a synonym of 'strange').
'cat' becomes 'puss' (puss is a kind of cat).
'with no tail' means to remove the last letter.
'puss' with its final letter taken off is 'pus'.
'rum'+'pus'='RUMPUS'
'caused by' is the link.
(Other definitions for rumpus that I've seen before include "Row" , "Noisy disturbance" , "Making a fuss" , "Uproar or angry dispute" , "Harsh rough nature" .)