Fair, say, I shall be heard (4)
I believe the answer is:
isle
'fair say' is the definition.
(Fair Isle is a Scottish island)
'i shall be heard' is the wordplay.
'i shall' becomes 'ill' (contraction of 'I will').
'be heard' shows a homophone (sound like).
'ill' sounds like 'ISLE'.
(Other definitions for isle that I've seen before include "Eg, eyot or inch" , "Rum, for example" , "Geographic location" , "Perspire" , "Dogs, perhaps" .)