Try getting front off organ (3)
I believe the answer is:
ear
'organ' is the definition.
(ear is a kind of organ)
'try getting front off' is the wordplay.
'try' becomes 'hear' (as in to try someone in court or hear their case).
'getting front off' means to remove the first letter (the front letter is removed).
'hear' with its first letter taken off is 'EAR'.
(Other definitions for ear that I've seen before include "Organ of hearing" , "Sense organ" , "That makes sense" , "Lug (colloq.)" , "organ with drum" .)