Bank entirely split in half (4)
I believe the answer is:
rely
'bank' is the definition.
(to bank on is to rely on)
'entirely split in half' is the wordplay.
'RELY' is hidden within the letters.
But, I'm unsure how this is indicated.
Can you help me to learn more?
(Other definitions for rely that I've seen before include "Depend (upon)" , "Be dependent" , "Depend or lean on" , "Lyre (anag.)" , "Bank (on someone)" .)