Here are the possible solutions for applied 3 in one to clue
Answer
Clue
Relevancy
anagram
Clue
Jumble wordplay applied to every Across answer except this one, yielding another word/word form
Definition
a word or phrase formed by the letters of another in different order
cap
Clue
One may be applied to salaries
Definition
to provide with a type of head covering
dag
Clue
Former UN leader Hammarskjöld [Note: The circled letters comprise a three-word instruction that, when applied to one square in the completed grid, reveals a group who might follow a code of silence]
Definition
to remove clotted tufts of wool from a sheep
edgetool
Clue
One applied to a grindstone
nailvarnish
Clue
Shiny fluid applied to the tips of one's digits
oiled
Clue
Applied 3-In-One to
Definition
OIL, to lubricate with a greasy substance
angelangle
Clue
Amount of slant applied to a Christmas tree topper?
