Is that a variant of 赩?

The text is a 5-syllable gushi authored by 金幼孜 (1368—1432).

In this poem, every couplet with encoded characters, end with 陌韻入聲 according to 洪武正韻.

脉，明母陌韻開口入聲
㦸，見母陌韻齊口入聲
北，幫母陌韻開口入聲
隙，溪母陌韻齊口入聲
息，心母陌韻齊口入聲
跡，精母陌韻齊口入聲
屴，來母陌韻齊口入聲
色，審母陌韻開口入聲
測，穿母陌韻齊口入聲
策，穿母陌韻開口入聲
懌，喻母陌韻齊口入聲
益，影母陌韻齊口入聲
冊，穿母陌韻開口入聲

The only couplet end with unencoded characters is 掃除氛祲靖，班師何⿰赤邑⿰赤邑, which end with ⿰赤邑. So ⿰赤邑 should also be of 陌韻入聲.

If ⿰赤邑 were indeed 郝, as is implied from the structure, it would be of 曉母藥韻開口入聲, which does not rhyme with other characters. So it is very likely a misprint of some character in 陌韻入聲, which brings us to 赩（曉母陌韻齊口入聲, =赫, eminent）. The shape is similar to ⿰赤邑 but rhyme well with other characters. The meaning also fits the context.

It is likely that ⿰赤邑 is transitioned from 赩 through the top-right component change: ⺈→𠚤→口.