Crossword Genius

Is heart surgery such a job? (6)

Ross

I believe the answer is:

inside

I'm a little stuck... Click here to teach me more about this clue!

'a job?' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

'is heart surgery such' is the wordplay.
'is heart' indicates the central letters.
'surgery' becomes 'clinic' (I've seen this before).
'such' becomes 'side' (I can't justify this - if you can you should believe this answer much more).
The middle of 'clinic' is 'in'.
'in'+'side'='INSIDE'

Can you help me to learn more?

(Other definitions for inside that I've seen before include "Imprisoned" , "Enid is (anag) - within" , "A sort of job" , "confined" , "undercover" .)

I've seen this clue in the Evening Standard.
Want a hint initially instead of a full solution? Install my app