Cryptic crossword clue
Supporters set out for gripping ties 7

The most common and most likely answer to this crossword clue is the 7 letter word FASTENS

I've seen this crossword clue in The Daily Telegraph
F
A
S
T
E
N
S

Buddy explains!

The straight part
We know that "ties" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ties = fastens.
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 FASTENS mean?

FASTENS verb
  1. To attach or connect in a secure manner.
  2. To cause to take close effect; to make to tell; to land.

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