1 down: the key is the meaning of the first word.
3 down: the parsing splits 2, 1, 3. The wordplay is fairly literal.
14 down: parsing splits 3, 3. The definition is the last 3 words.
For the southwest corner, if you have 5 down, there is an across entry where the predictable first two letters from the word play start the second entry in the seventh row.