take some —
• be difficult to do or effect in the specified way.
• "he might take some convincing"
take some doing
• be difficult to achieve.
• "it would take some doing to calm him down"
Similar:
effort,
exertion,
work,
hard work,
application,
labour,
toil,
struggle,
strain,
pains,
elbow grease,
travail,
