The most common and most likely answer to this crossword clue is the 7 letter word FISHERS
I've seen this crossword clue in The Guardian
F
I
S
H
E
R
S
Buddy explains!
The straight part
We know that "Those searching" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case those searching = fishers.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 FISHERS mean?
FISHERS noun- A person who catches fish, especially for a living or for sport.
- A person attempting to catch fish.
- A North American marten, Martes pennanti, that has thick brown fur.
- The fur of Martes pennanti.