Possible Clues:

• Start of a weekly cry
• Letters before ''Fridays''
• ___ Fridays ('Happy Every Hour' restaurant)
• -- Fridays
• -- Fridays (dining chain)
• "__F!": pre-weekend cry
• "In Here, It's Always Friday" letters
• __ Fridays (restaurant chain)
• __ Fridays (Applebee's rival)
• Start of an end-of-week cry that's followed by 26-Across