Noted passage roughly skirting port close to Suez (7)
I believe the answer is:
cadenza
'noted passage' is the definition.
(type of musical passage)
'roughly skirting port close to suez' is the wordplay.
'roughly' becomes 'ca'.
'skirting' indicates putting letters inside.
'port' becomes 'aden' (I've seen this before).
'close to' says to take the final letters (the close/ending of).
The final letter of 'suez' is 'z'.
'aden'+'z'='adenz'
'ca' placed around 'adenz' is 'CADENZA'.
(Other definitions for cadenza that I've seen before include "One's passage" , "Virtuoso solo passage near the end of a piece of music" , "Elaborate musical flourish" , "Solo display passage" , "Final elaborate, showy solo in concerto etc." .)