### Clue: Yell, perhaps, or be quiet, sweetest heart: if air is air and sea is sea … (8,6)
### Answer: SHETLAND ISLAND 
 ### Explanation: Definition: Ye
A charade of SH ('be quiet') plus ET ('swe**ET**est heart') lus LAND IS LAND (referenced jocularly to follow 'if air is air and sea is sea …').