Faraday lied about speciality (5)
I believe the answer is:
field
'speciality' is the definition.
(the field or sphere someone works in)
'faraday lied about' is the wordplay.
'faraday' becomes 'f' (this could be a standard abbreviation which I don't know about).
'about' indicates anagramming the letters.
'lied' anagrammed gives 'ield'.
'f'+'ield'='FIELD'
Can you help me to learn more?
(Other definitions for field that I've seen before include "his nocturnes, perhaps?" , "Area of farm land" , "Crop land; catch (ball)" , "Area for crops/livestock" , "Area of interest" .)