Honour in clinching silver (6)
I believe the answer is:
homage
'honour' is the definition.
(I have seen 'Public honour ' mean 'homage' so perhaps 'honour' could also mean 'homage')
'in clinching silver' is the wordplay.
'in' becomes 'home' ('he's in' can mean 'he's home').
'clinching' indicates putting letters inside.
'silver' becomes 'ag' (Ag is the chemical symbol for silver).
'home' placed around 'ag' is 'HOMAGE'.
(Other definitions for homage that I've seen before include "Respectful deference" , "Reverent regard" , "Tribute, reverence" , "Due respect" , "Formal expression of loyalty to a ruler - pay it" .)