The most common and most likely answer to this crossword clue is the 4 letter word YOGI
I've seen this crossword clue in Financial Times
Y
O
G
I
More clues leading to the result YOGI
- Old soldier on back in agony: stretcher found?
- I turn back behind unknown Hindu ascetic
- Gentile standing on head, one participant in spiritual discipline
- Fictional bear‘s an adherent of Hindu philosophical system
- One Gentile upset follower of Hindu philosophy
- I try latest in ontology, backing philosophy student
- Hindu ascetic American’s greeting with grunt
- Adherent of a Hindu philosophy in Tokyo Girl
- Anyone raging repeatedly inside needs this spiritualist?
- Mystic one Spanish painter almost knocked back
Buddy explains!

The straight part
We know that "Adherent of a Hindu philosophy" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case adherent of a hindu philosophy = yogi.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 YOGI mean?
YOGI noun- A devotee or adherent of yoga.
- To turn (someone) into a yogi; to lead into practicing yoga.
- (thru-hiker slang) To persuade someone to give you food or other favors without actually begging.