The F in Sunscreen's SPF
This page is the CodyCross answer for the clue below from Campsite Adventures, Group 833, Puzzle 1 (Canoe Paddles).
Question is: The F in Sunscreen's SPF
and the answer is: FACTOR
Word Meaning:
FACTOR — (obsolete) A doer, maker; a person who does things for another person or organization.
Definitions from Wiktionary.