The most common and most likely answer to this crossword clue is the 7 letter word SIGNAGE
I've seen this crossword clue in Independent
S
I
G
N
A
G
E
Buddy explains!

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 SIGNAGE mean?
SIGNAGE noun- Signs, particularly those imparting commercial, directional, or road traffic information, taken collectively.
- A sign, a signboard.