On one’s feet with regularity giving instruction to bank (8,5)
I believe the answer is:
standing order
'instruction to bank' is the definition.
(I've seen this before)
'on one's feet with regularity' is the wordplay.
'on one's feet' becomes 'standing' (I've seen this before).
'with' is a charade indicator (letters next to each other).
'regularity' becomes 'order'.
'standing'+'order'='STANDING ORDER'
'giving' acts as a link.
(Other definitions for standing order that I've seen before include "rise!" , "Instruction for bank to make regular payments" , "gets you on your feet!" , "Instruction to bank for payment at regular intervals" , "Regular way to pay" .)