Well-dressed in congregation at Tyrone (5)
I believe the answer is:
natty
'well-dressed' is the definition.
(I've seen this in another clue)
'in congregation at tyrone' is the wordplay.
'in' says the answer is hidden in the clue.
'NATTY' is hidden within 'congregation at tyrone'.
(Other definitions for natty that I've seen before include "Smart, fashionable (colloq.)" , "Stylish" , "Dapper (colloq.)" , "Informally neat and well-dressed" , "Smart, spruce" .)