it will take some doing

it will take some doing

It will be particularly difficult or require a large amount of effort. Well, it will take some doing, but I think I can get the engine up and running again. I reckon we can get it finished by tomorrow, but it'll take some doing.
See also: take, will
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

It will take some doing.

It will require considerable effort and care. It'll take some doing, but it'll get done. It's not impossible. It'll just take some doing.
See also: take, will
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
See also: