Community leaders have called for calm. The underlined part is -

• Community leaders have called for calm. The underlined part is - Noun.

• Calm: [noun]
Meaning: a quiet or peaceful period or situation.
Bangla meaning: a calm যখন সবকিছু শান্ত থাকে; প্রশান্তি।

Example:
- The police appealed for calm.
- Community leaders have called for calm.

Source: Cambridge, Oxford & Accessible Dictionary.