Possible Clues:

• Factor superhero represented as a normal occurrence
• Old man on river in resort, about 72?
• Expected result ... or what the ends of the starred clues' answers help you achieve (on a good day)
• A little salmon cut as starter perhaps is to be expected
• Average ... or a literal hint to 17-, 26- and 42-Across
• What's expected of aide, going forward, in emergency action?
• About as expected
• About average
• Nothing new
• The usual salmon to serve uncouth folk, it's said