Arranging childcare over the school holidays can be a realconundrumfor working parents. The underlined part is -

• Arranging childcare over the school holidays can be a real conundrum for working parents. The underlined part is - Noun.

• Conundrum (noun)

English Meaning: A problem that is difficult to deal with.
Bangla Meaning: কঠিন প্রশ্ন; বাধা।

Other Forms: Conundrumical (Informal/ rare use)

Example Sentence: 
1. Arranging childcare over the school holidays can be a real conundrum for working parents.
2. The problem remains a conundrum to me, and I hope others can propose ways of dealing with it.

Source: website Lecture.