Get rid of clothes for all to see parasite (5)
I believe the answer is:
louse
'parasite' is the definition.
(type of parasitic insect)
'get rid of clothes for all' is the wordplay.
'get rid of' becomes 'lose' (I've seen this in another clue).
'clothes' means one lot of letters goes inside another (inserted letters are clothed in others).
'for all' becomes 'U' (Universal film certificate - suitable for all).
'lose' going around 'u' is 'LOUSE'.
'to see' is the link.
(Other definitions for louse that I've seen before include "Nit" , "Parasite; nasty person" , "Wingless parasite" , "From cad" , "Rogue" .)