Strangely overdrawn - delay with regular withdrawals (5)
I believe the answer is:
oddly
'strangely' is the definition.
('oddly' can be a synonym of 'strangely')
'overdrawn delay with regular withdrawals' is the wordplay.
'overdrawn' becomes 'od'.
'with regular withdrawals' means one should take alternating letters.
The alternate letters of 'delay' are 'dly'.
'od'+'dly'='ODDLY'
(Other definitions for oddly that I've seen before include "In a peculiar way" , "strange to say?" , "Strangely, curiously" , "Weirdly" , "In a strange way" .)