OAP scrubbing head with fruit with bad acne's emergence (10)
I believe the answer is:
appearance
'emergence' is the definition.
(thesaurus)
'oap scrubbing head with fruit with bad acne's' is the wordplay.
'scrubbing head' means to remove the first letter (the word's head is scrubbed away).
'with' means one lot of letters go next to another.
'fruit' becomes 'pear' (pear is a kind of fruit).
'with' is a charade indicator (letters next to each other).
'bad' indicates an anagram.
'oap' with its first letter taken away is 'ap'.
'acne' is an anagram of 'ance'.
'ap'+'pear'+'ance'='APPEARANCE'
(Other definitions for appearance that I've seen before include "Look; impression given" , "show" , "manifestation" , "Bearing - pretence" , "it seems" .)