The most common and most likely answer to this crossword clue is the 8 letter word SENTIENT
I've seen this crossword clue in The Daily Telegraph
S
E
N
T
I
E
N
T
More clues leading to the result SENTIENT
- Feeling awfully tense holding one set of holy works
- Feeling ecstatic about money, grabbing fortune finally
- . Conscious thought, but miles away
- Conscious and excited about new obligation
- Aware of extremely subversive and evil intent
- Feeling ecstatic about new obligation
- Feeling excited, that is, not without love
- Aware of feeling medium disregarded
- Conscious of emotion when maiden has departed
- Aware opinion lacks dynamism, ultimately
Buddy explains!

The straight part
We know that "Feeling" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case feeling = sentient.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 SENTIENT mean?
SENTIENT noun- Lifeform with the capability to feel sensation, such as pain.
- An intelligent, self-aware being.
- Experiencing sensation, thought, or feeling.
- Able to consciously perceive through the use of sense faculties.
- Possessing human-like awareness and intelligence.