Serving to expound or set forth:
— Clean expository writing.

synoniem: expositive.

Roget 595: discursive, discoursive^†; disquisitionary^†; expository.   

Roget 527: informed etc. v.; communique; reported etc. v.; published etc. 531.    expressive etc. 516; explicit etc. (open) 525, (clear) 518; plain spoken &c., (artless) 703.    nuncupative, nuncupatory^†; declaratory, expository; enunciative^†; communicative, communicatory^†.    ... meer laten zien

Roget 522: explanatory, expository; explicative, explicatory; exegetical^†; construable.    polyglot; literal; paraphrastic, metaphrastic^†; consignificative^†, synonymous; equivalent etc. 27.    ... meer laten zien