French dish: mash pear evenly, for thin crinkled sheets (5,5)
I believe the answer is:
crepe paper
'thin crinkled sheets' is the definition.
'french dish mash pear evenly' is the wordplay.
'french dish' becomes 'crepe' (I've seen this before).
'mash' becomes 'pap' (I've seen this in another clue).
'evenly' means one should take alternating letters (the letters in even-numbered positions).
The alternate letters of 'pear' are 'er'.
'crepe'+'pap'+'er'='CREPE PAPER'
'for' acts as a link.
(Other definitions for crepe paper that I've seen before include "Thin crinkly sheet" , "Something used to make decorations" , "crinkly sheets" .)