Disgusting young man transfixed by internet, initially looking up naked women (7)
I believe the answer is:
noisome
'disgusting' is the definition.
(I've seen this before)
'young man transfixed by internet initially looking up naked women' is the wordplay.
'young man' becomes 'son' (male child).
'transfixed by' is an insertion indicator.
'initially' suggests taking the first letters.
'looking up' says the letters should be written in reverse (in a down clue, letters go up).
'naked' says to take the centre (outside letters removed so centre is unclothed).
The middle letters of 'women' are 'ome'.
The initial letter of 'internet' is 'i'.
'son' going around 'i' is 'sion'.
'sion' written backwards gives 'nois'.
'nois'+'ome'='NOISOME'
(Other definitions for noisome that I've seen before include "Offensively malodorous" , "Harmful - offensive" , "Repellent" , "Evil-smelling - sounds loud" , "Disgusting -- ie moons (anag)" .)