a catch to (something)

a catch to (something)

A problem, drawback, or hidden detriment to an idea or situation, often one that is initially concealed as a means of entrapment. I know this sounds like a great offer, but there's a pretty big catch to it—I'd have to move across the country.
See also: catch, to
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

catch to it

a hidden problem associated with it. It sounds good at first, but there's a catch to it. You have to pay all costs up front.
See also: catch, to
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
See also: