1: Capital investment producing hard faces (9)
2: New England river flowing with less constraint (7)
3: Gee, side dish doesn't include company's observation about gas? (6,3)
4: Fix the oil platform ... (3)
5: Drinker taking pint from wife, perhaps (5)
6: Small pieces of choral works missing tenor part (5)
7: Questionable chits rejected by Abbott (7)
8: Agreeable to taking in Eastern relative (5)
13: Pull 500 from newfallen snow (5)
16: In Germany, the monster returned from the east. (5)
17: One who wanders amidst fantastic text is one who is very outgoing (9)
18: Over 24 hours, Parisian street may feel remorse (3,3,3)
20: Heading from the Dakotas to the Little Big Horn, general is waylaid by a person who can look into the future, and backs out (7)
22: Ross bit nuts in restaurants (7)
23: Gutter seamstress (5)
25: Gibson working for shareholders' profit (5)
28: Gorilla taking head off at it's base! (3)