town clerk vs official

town clerk and official both are nouns.

Word	Noun	Adjective	Verb	Adverb
town clerk	Yes	No	No	No
official	Yes	Yes	No	No

As nouns, official is a hypernym of town clerk; that is, official is a word with a broader meaning than town clerk:

Other hypernyms of town clerk include functionary.

town clerk (noun)	official (noun)
the official who keeps a town's records	someone who administers the rules of a game or sport
	a worker who holds or is invested with an office

town clerk (adjective)	official (adjective)
	having official authority or sanction
	of or relating to an office
	verified officially
	(of a church) given official status as a national or state institution
	conforming to set usage, procedure, or discipline