in the gugue style, but not strictly like a fugue.

A composition resembling a fugue.

is a section in a piece of music that has characteristics of a fugue, but is not a separate fugue movement itself. The term is also used to describe a fugue-like piece that lacks most of the usual contents of a fugue. [SE

a passage in a fugal style that characterizes a portion of a composition that is not a fugue. Fugal style means having a motive that functions as subject and is answered at another pitch level, in a variety of combinations.

A fugal passage within a composition.

Imitative, fugue-like passage in a non-fugal movement. It will suggest fugal practice but not necessarily follow through with all the technical demands of a true fugue. The finale of Mozart's "Jupiter" Symphony concludes with a brilliant fugato.

a fugue-like passage

in the fugue style.

A fugal passage in a nonfugal piece, such as in the development section of a sonata-allegro form.