Love revolting dirt about leading industrialist in disgrace (5)
I believe the answer is:
odium
'disgrace' is the definition.
(I've seen this in another clue)
'love revolting dirt about leading industrialist' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'revolting' is a reversal indicator.
'dirt' becomes 'mud' (mud is a kind of dirt).
'about' indicates putting letters inside.
'leading' says to take the initial letters.
The first letter of 'industrialist' is 'i'.
'mud' placed around 'i' is 'muid'.
'muid' written backwards gives 'dium'.
'o'+'dium'='ODIUM'
'in' is the link.
(Other definitions for odium that I've seen before include "Widespread dislike or disgust" , "that would cause disgust" , "Widespread hatred or disgust felt towards someone" , "General dislike" , "Disfavour" .)