The most common and most likely answer to this crossword clue is the 7 letter word RECIPES
I've seen this crossword clue in The Daily Telegraph
R
E
C
I
P
E
S
More clues leading to the result RECIPES
- Terribly precise cooking instructions
- These are pretty precise on ground spice
- Instructions to follow prophet, holding image skyward
- Chefs’ instructions to serve up classic cuisine, ultimately, in empty restaurants
- Repeats, needing time for Planck’s first formulae
- Unusually precise instructions
- Unusually precise cooking instructions
- Formulas for fixing prices inclusive of energy!
- Cooking instructions in precise form
- Distributed precise formulae
Buddy explains!

The straight part
We know that "instructions" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case instructions = recipes.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 RECIPES mean?
RECIPES noun- A formula for preparing or using a medicine; a prescription; also, a medicine prepared from such instructions.
- Any set of instructions for preparing a mixture of ingredients.
- By extension, a plan or procedure to obtain a given end result; a prescription.
- Now especially, a set of instructions for making or preparing food dishes.
- A set of conditions and parameters of an industrial process to obtain a given result.