About end of April money finally comes to bank (4)
I believe the answer is:
Here is my best explanation:
'bank' is the definition.
(I've seen this before)
'about end of april money finally' is the subsidiary indication.
'about' becomes 're' (common abbreviation for 'with reference to'**).
'end of' suggests the final letters.
'finally' suggests the final letters.
The last letter of 'april' is 'l'.
The last letter of 'money' is 'y'.
'comes to' is the link.
(Other definitions for rely that I've seen before include "Have trust (in)", "Depend (upon)", "Old rally", "Bank (on someone)", "Depend on with confidence", "Have confidence or faith in", "Be dependent", "Depend, bank", "Run and see" and "Depend or lean on".)