Cryptic crossword clue
Joining one, perhaps, with gin cocktail 7

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

I've seen this crossword clue in The Daily Telegraph
U
N
I
T
I
N
G

Buddy explains!

The straight part
We know that "Joining" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case joining = uniting.
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 UNITING mean?

UNITING verb
  1. To bring together as one.
  2. To come together as one.
UNITING noun
  1. The act by which things are united; the formation of a union.

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