Possible Clues:

• This seems like E with water all around
• He's E. A proper old cod there
• Where 8 down might be found, 'e is there
• He's E there in 15 across
• That's where he's E and wet
• Not where you'd be looking for 30 across - where he's E
• Salt's here
• That's where 'e is after 28 across is flying
• Where he's E with salty surroundings
• It's not on land that he's E