c'est

1. it is (used to define the preceding word)
2. it is (used to introduce a focus)
3. this is

un

• Article

  an, a

• Num
• Pron
• Noun

papillon

1. butterfly
2. someone brilliant, versatile and inconstant
3. knot
4. Ellipsis of écrou papillon.; wing nut, butterfly nut
5. butterfly stroke
6. (colloquial) parking ticket
7. butterfly valve

des

• Article

  1. plural of un (“some; the plural indefinite article”)
  2. plural of une (“some; the plural indefinite article”)
  3. plural of du (“some; the plural partitive article”)
  4. plural of de la (“some; the plural partitive article”)
  5. plural of de l’ (“some; the plural partitive article”)

• Contraction

clairières

plural of clairière