The most common and most likely answer to this crossword clue is the 6 letter word ASANAS
I've seen this crossword clue in Financial Times
A
S
A
N
A
S
Buddy explains!
The straight part
We know that "Poses" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case poses = asanas.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 ASANAS mean?
ASANAS noun- A body position, typically associated with the practice of yoga.
- Any of certain trees of genus Pterocarpus
- The wood of such trees, sometimes sold as Philippine mahogany.