Shopkeeper, doctor and mimic taking risks from the start (6)
I believe the answer is:
draper
'shopkeeper' is the definition.
(I've seen this before)
'doctor and mimic taking risks from the start' is the wordplay.
'doctor' becomes 'dr' ('Dr' can be a synonym of 'doctor'**).
'and' means one lot of letters go next to another.
'mimic' becomes 'ape' (I've seen this before).
'taking' means one lot of letters go next to another.
'from the start' suggests taking the first letters.
The initial letter of 'risks' is 'r'.
'dr'+'ape'+'r'='DRAPER'
(Other definitions for draper that I've seen before include "He sells fabrics" , "Dealer in fabrics etc" , "Cloth merchant" , "Dealer in cloth and clothing" , "Dealer in fabric and haberdashery" .)