Crossword Genius

Old master got rash over middle of thigh — whom to consult? (13)

Ross

I believe the answer is:

dermatologist

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

'whom to consult?' is the definition.
I can't judge whether this definition defines the answer.

'old master got rash over middle of thigh' is the wordplay.
'rash' is an anagram indicator (a reckless or careless ordering of the letters).
'over' means one lot of letters goes inside another.
'middle of' says to take the centre.
The central letter of 'thigh' is 'i'.
'old'+'master'+'got'='oldmastergot'
'oldmastergot' anagrammed gives 'dermatologst'.
'dermatologst' going around 'i' is 'DERMATOLOGIST'.

Can you help me to learn more?

(Other definitions for dermatologist that I've seen before include "Expert in skin disorders" , "Skin disorder expert" , "medical consultant needed" , "Skin disease expert" , "Skin specialist" .)

I've seen this clue in The Hindu.
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