The most common and most likely answer to this crossword clue is the 8 letter word ADVISORY
I've seen this crossword clue in The Daily Telegraph
A
D
V
I
S
O
R
Y
More clues leading to the result ADVISORY
- Warning notice avoids funny lines
- Helping upset diva with heartless apology
- Consultative volume is probing trouble with railway
- Recommending power gets put into a small boat
- Consulting Davis: desperate alternative at May’s end
- Protection for viewer during stormy day is recommended
- In the position of a back-seat driver?
- Consulting advert on screen, terminal in library
- Lady needing end of wall hidden has installed screen, as recommended
- . Using eyeshade during windy day is recommended
Buddy explains!

The straight part
We know that "recommended" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case recommended = advisory.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 ADVISORY mean?
ADVISORY noun- A warning.
- Able to give advice.
- Containing advice; advising.