Bond returning on waves showing excess (7)
I believe the answer is:
surfeit
'excess' is the definition.
(I know that excess can be written as surfeit)
'bond returning on waves' is the wordplay.
'bond' becomes 'tie' (both can mean a connection).
'returning' shows that the letters should be reversed in order.
'on' says to put letters next to each other.
'waves' becomes 'surf' (I've seen this in other clues).
'tie' written backwards gives 'eit'.
'eit' put after 'surf' is 'SURFEIT'.
'showing' is the link.
(Other definitions for surfeit that I've seen before include "stuff, once" , "Fustier (anag)" , "having had quite enough" , "Excess, glut" , "excessive amount" .)