The answers to the clues below will have something in common.

1. Toll road
2. Glide on ice
3. Moan and groan
4. Stroke of luck

Answers:

Each clue can be answered with a word that is also the name of a fish:

1. Pike
2. Skate
3. Carp
4. Fluke 

Credit:
LA Times Crossword 
June 12, 2016
Ron Toth and C.C. Burnikel
GOING TO SCHOOL