Greek god giving that girl endless chaos (6)
I believe the answer is:
Here is my best explanation:
'greek god' is the definition.
(Hermes is an example)
'giving that girl endless chaos' is the subsidiary indication.
'giving' is a charade indicator (letters next to each other).
'that girl' becomes 'her' (**).
'endless' means to remove the last letter.
'chaos' becomes 'mess' (I've seen this before).
'mess' with its final letter taken away is 'mes'.
'her' put next to 'mes' is 'hermes'.
(Other definitions for hermes that I've seen before include "Greek god of commerce and theft", "Winged messenger", "Greek messenger god", "Greek God", "Greek messenger of the gods, like Roman Mercury", "Messenger and herald of the gods" and "Messenger of the Greek gods".)