Get her eating nibbles on that account (7)
I believe the answer is:
thereat
'on that account' is the definition.
(I've seen this in another clue)
'get her eating nibbles' is the wordplay.
'THEREAT' is hidden within the letters.
However, I'm uncertain how this is indicated.
Can you help me to learn more?
(Other definitions for thereat that I've seen before include "On account of that" , "At that place" , "Theatre (anag)" , "At that point" .)