Doctor prescribed after damage seen in monkey (8)
I believe the answer is:
marmoset
'monkey' is the definition.
(I know that marmoset is a type of New World monkey)
'doctor prescribed after damage' is the wordplay.
'doctor' becomes 'mo' (medical officer).
'prescribed' becomes 'set' (set can mean pre-determined or prescribed).
'after' means one lot of letters go next to another.
'damage' becomes 'mar' (to mar is to spoil or damage).
'mo'+'set'='moset'
'moset' after 'mar' is 'MARMOSET'.
'seen in' acts as a link.
(Other definitions for marmoset that I've seen before include "Small monkey - Rome's mat (anag)" , "Turn morse mat over for the monkey" , "rather small creature" , "Star memo about kind of monkey" , "Arms me to (anag) - animal" .)