Cryptic crossword clue
Like jerks, heartless grey men lead in this sport 10

The most common and most likely answer to this crossword clue is the 10 letter word GYMNASTICS

I've seen this crossword clue in The Guardian
G
Y
M
N
A
S
T
I
C
S

Buddy explains!

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

GYMNASTICS noun
  1. A sport involving the performance of sequences of movements requiring physical strength, flexibility, and kinesthetic awareness.
  2. Complex intellectual or artistic exercises or feats of physical agility.

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