Detergent's bogus power over heart of pathogens (7)
I believe the answer is:
shampoo
'detergent's' is the definition.
(thesaurus)
'bogus power over heart of pathogens' is the wordplay.
'bogus' becomes 'sham' (I've seen this before).
'power' becomes 'p'.
'over' becomes 'o' (cricket abbreviation**).
'heart of' means to look at the middle letters.
The centre of 'pathogens' is 'o'.
'sham'+'p'+'o'+'o'='SHAMPOO'
(Other definitions for shampoo that I've seen before include "Washer for locks" , "clean" , "Hair-cleaner" , "Bathroom preparation" , "Hair or carpet cleaner" .)