In short, a medical act to see? (3)
I believe the answer is:
doc
'in short a medical' is the definition.
I can't judge whether this defines the answer.
'act to see?' is the wordplay.
'act' becomes 'do' (I've seen this in other clues).
'to' says to put letters next to each other.
'see?' becomes 'c' (the word for the letter, according to Chambers**).
'do'+'c'='DOC'
Can you help me to learn more?
(Other definitions for doc that I've seen before include "Physician (colloq.)" , "Medic (colloq.)" , "Holliday (in 17 24)" , "GP (colloq.)" , "scaled-down version of GP" .)