Disturbance caused by strange Manx cat? (6)
I believe the answer is:
rumpus
'disturbance' is the definition.
(rumpus is a kind of disturbance)
'strange manx cat?' is the wordplay.
'strange' becomes 'rum' (I've seen this before).
'manx' means to remove the last letter (Manx cats have no tail).
'cat?' becomes 'puss' (puss is a kind of cat).
'puss' with its final letter taken away is 'pus'.
'rum'+'pus'='RUMPUS'
'caused by' is the link.
(Other definitions for rumpus that I've seen before include "Kerfuffle" , "Noisy disturbance" , "To-do" , "Noisy brawl" , "Uproar or angry dispute" .)