Merchant banker finally meeting online follower? (8)
I believe the answer is:
retailer
'merchant' is the definition.
(retailer is a kind of merchant)
'banker finally meeting online follower?' is the wordplay.
'finally' suggests the final letters.
'meeting' means one lot of letters go next to another.
'online' becomes 'e' (as in e-mail or e-commerce).
'follower?' becomes 'tailer' (**).
The final letter of 'banker' is 'r'.
'r'+'e'+'tailer'='RETAILER'
(Other definitions for retailer that I've seen before include "One selling to consumers" , "Tradesman" , "One selling to public" , "High street trader?" , "teller" .)