It’s dangerous to be breezy with a hothead (5)
I believe the answer is:
Here is my best explanation:
'it's dangerous' is the definition.
'breezy with a hothead' is the subsidiary indication.
'breezy' becomes 'airy' (I've seen this before).
'with' says to put letters next to each other.
'a hothead' becomes 'h' (head letter of 'hot').
'airy' after 'h' is 'hairy'.
'to be' is the link.
(Other definitions for hairy that I've seen before include "alarming", "An ape may be", "Perilous", "Armpits can be", "like Esau", "fraught with danger", "triggering alarm", "description of Jacob's brother Esau", "Hirsute - dangerous" and "Dangerous".)