The most common and most likely answer to this crossword clue is the 6 letter word COSINE
I've seen this crossword clue in The Guardian
C
O
S
I
N
E
More clues leading to the result COSINE
- Function in college produced noise
- Function in garden is occasionally set up
- Function is reversed in dry fruit
- Function where figure hosts number
- Nothing wrong in church function
- Function is elevated in solid figure
- Function in East after costs reduced by 40%
- In a comparison of sides, wrong for runner to go round
- Function pictures, having airbrushed mother, capturing Oscars
- Wrong to block firm with European function
Buddy explains!
The straight part
We know that "Function/Function" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case function/function = cosine.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does COSINE mean?
COSINE noun- In a right triangle, the ratio of the length of the side adjacent to an acute angle to the length of the hypotenuse. Symbol: cos