The most common and most likely answer to this crossword clue is the 6 letter word SESTET
S
E
S
T
E
T
More clues leading to the result SESTET
- Tsetse flies around some feet
- Musical group is French, given position outside
- Six together established in group
- Two similar groups interlocking to form musical ensemble
- Group of six tsetse flies?
- Place holding estimated group of six
- Failure in short test set about ‘Shall I compare thee to a summer’s day?’ lines 9-14, say?
- A group of six tsetse flies
Buddy explains!

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 SESTET mean?
SESTET noun- A piece of music composed for six voices or six instruments; a sextet or sestuor.
- The last six lines of a sonnet, forming two stanzas of three lines each.