He was a bear of a man is that an example of a metaphor

Yes, 'he was a bear of a man' is an example of a metaphor.

Explanation:

We know this because it directly compares two things, similar to similes. However, unlike similes, it doesn't use 'like' or 'as'. Which sets it apart and is why it is a metaphor.

Yes it is because it used another object to compare to the noun and does not use 'as' or 'like' to compare the object and the noun