The most common and most likely answer to this crossword clue is the 6 letter word NOTING
N
O
T
I
N
G
More clues leading to the result NOTING
- Observing what a symphony in F is, say?
- Observing absence of sound from bell?
- Observing what faulty bell has?
- Observing husband isn't in love
- Observing that bell is silent?
- Observing sweet Fanny Adams losing heart
- Observing nonentity ignoring hospital
- Taking down unpopular government
- Observing nowt after losing heart
- Observing love, heart ripped out
Buddy explains!

The straight part
We know that "Observing" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case observing = noting.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 NOTING mean?
NOTING verb- To notice with care; to observe; to remark; to heed.
- To record in writing; to make a memorandum of.
- To denote; to designate.
- To annotate.
- To set down in musical characters.
- To record on the back of (a bill, draft, etc.) a refusal of acceptance, as the ground of a protest, which is done officially by a notary.
- Not any thing; no thing.
- An absence of anything, including empty space, brightness, darkness, matter, or a vacuum.
- A note; a written remark.