The most common and most likely answer to this crossword clue is the 5 letter word SENSE
I've seen this crossword clue in The Times
S
E
N
S
E
More clues leading to the result SENSE
- Faculty notice about new Society
- Divine smell, for example
- Daughter dismissed from post by small English faculty
- Understanding directions for pen strokes to draw F on its side?
- Reason bridge team is participating in match
- Detect both poles coming into view
- Perhaps hearing report of euro’s make-up
- . Feel uptight? Time to leave for northern tip of Sardinia!
- Shakin’ Stevens ignoring TV impression
- Feel trapped in chosen setting
Buddy explains!

The straight part
We know that "Understanding" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case understanding = sense.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 SENSE mean?
SENSE noun- Any of the manners by which living beings perceive the physical world: for humans sight, smell, hearing, touch, taste.
- Perception through the intellect; apprehension; awareness.
- Sound practical or moral judgment.
- The meaning, reason, or value of something.
- A natural appreciation or ability.
- The way that a referent is presented.
- A single conventional use of a word; one of the entries for a word in a dictionary.
- One of two opposite directions in which a vector (especially of motion) may point. See also polarity.
- One of two opposite directions of rotation, clockwise versus anti-clockwise.
- Referring to the strand of a nucleic acid that directly specifies the product.
- To use biological senses: to either see, hear, smell, taste, or feel.
- To instinctively be aware.
- To comprehend.