Carried by a wave? (4)
I believe the answer is:
bore
This clue is a double definition.
'carried' is the first definition.
(I've seen this before)
'a wave?' is the second definition.
(thesaurus)
'by' is the link.
(Other definitions for bore that I've seen before include "Dull person; hole" , "Tedious chap" , "Tedious thing" , "Hollow barrel" , "Person who talks tediously" .)