プログレッシブ和英中辞典(第4版)の解説
みせかけ【見せ掛け】
〔外見〕(a) show, a look；〔偽り〕a sham, (a) make-believe, (a) pretense，《英》 (a) pretence
見せ掛けの apparent; sham; make-believe
見せ掛けだけはいいが
It looks good, but...
これは見せ掛けの代物だ
This is all make-believe.
あの会社は景気がよさそうだが見せ掛けだけだ
That company 「has the appearance [puts on a show] of prosperity, but business is not really very good.