That woman in Bow managed to get medical degree and commissions (7)

I believe the answer is:
errands
'commissions' is the definition.
(I've seen this in another clue)
'that woman in bow managed to get medical degree' is the wordplay.
'that woman in bow' becomes ''er' ('her' - her refers to a woman - said with the 'H' dropped - a cockney accent.).
'managed to get' becomes 'ran' (I've seen this in other clues).
'medical degree' becomes 'ds' (DS is an example. I am not sure about the 'medical' bit.).
'er'+'ran'+'ds'='ERRANDS'
'and' is the link.
Can you help me to learn more?
(Other definitions for errands that I've seen before include "Process for finding how often a number is contained in another" , "Task-oriented trips" , "shopping trips" , "Missions" , "Short trips for messages" .)
