The most common and most likely answer to this crossword clue is the 6 letter word HEPTAD
I've seen this crossword clue in Financial Times
H
E
P
T
A
D
More clues leading to the result HEPTAD
- Group of seven in gym detained by principal
- Group knowing a little bit
- Boss welcomes training group
- Magnificent group? A bit trendy to begin with
- Principal holding gym class in the Plough, say?
- Point in uppermost part of the Pleiades, for example
- Group knowing a bit
- Group of seven had pet bats
- Magnificent group, as an example, needs leader to accept point
Buddy explains!
The straight part
We know that "Group" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case group = heptad.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 HEPTAD mean?
HEPTAD noun- A group of seven things.
- A sequence of seven bases.