Hirsute Parisian's one with small hooter (7)
I believe the answer is:
unshorn
'hirsute' is the definition.
(thesaurus)
'parisian's one with small hooter' is the wordplay.
'parisian's one' becomes 'un' ('one' in French, eg in Paris).
'with' means one lot of letters go next to another.
'small' becomes 's' (abbreviation - e.g. clothes size).
'hooter' becomes 'horn' (I've seen this before).
'un'+'s'+'horn'='UNSHORN'
(Other definitions for unshorn that I've seen before include "Of hair or wool, not cut" , "still having woollen coat on" .)