The most common and most likely answer to this crossword clue is the 6 letter word ANIMUS
I've seen this crossword clue in Financial Times
A
N
I
M
U
S
More clues leading to the result ANIMUS
- Friction a problem in wheels
- Problem in pirouettes after a bad feeling
- Bad feeling about main land of Trump
- I am included in an American’s hostility
- Problem present with America’s rising hostility
- Awfully glad this inner man, to be served salmagundi?
- Target incorporating North American hatred
- Returned amount of money in a feeling of hostility
- Christian, I must squash this hostility
- In Japan I mustn’t find hostility
Buddy explains!

The straight part
We know that "Awfully glad this inner man" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case awfully glad this inner man = animus.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 ANIMUS mean?
ANIMUS noun- The basic impulses and instincts which govern one's actions.
- A feeling of enmity, animosity or ill will.
- The masculine aspect of the feminine psyche or personality.