Leaders in acoustics designed more suitable connector (7)
I believe the answer is:
adapter
'connector' is the definition.
'leaders in acoustics designed more suitable' is the wordplay.
'leaders in' suggests taking the first letters.
'more suitable' becomes 'apter' (more apt).
The initial letters of 'acoustics designed' is 'ad'.
'ad'+'apter'='ADAPTER'
(Other definitions for adapter that I've seen before include "Plug device" , "'Apt, dear!' (anag.); a switching device" , "Dear Pat (anag)" , "I could modify" , "Plug attachment" .)