The most common and most likely answer to this crossword clue is the 11 letter word ORIENTATING
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Buddy explains!
The straight part
We know that "Determining one’s position" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case determining one’s position = orientating.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 ORIENTATING mean?
ORIENTATING verb- To face a given direction.
- To determine one's position relative to the surroundings; to orient (oneself).
- To arrange in order; to dispose or place (a body) so as to show its relation to other bodies, or the relation of its parts among themselves.
- To position (something), to align relative to a given position.
- To move or turn toward the east; to veer from the north or south toward the east.
- That changes an orientation.