Lemon squash (should taste sweet!) (5)
I believe the answer is:
melon
'should taste sweet' is the definition.
I can't tell whether this defines the answer.
'lemon squash' is the wordplay.
'squash' is an anagram indicator (I've seen this in other clues).
'lemon' with letters rearranged gives 'MELON'.
Can you help me to learn more?
(Other definitions for melon that I've seen before include "Honeydew fruit" , "Sweet juicy gourd" , "Fruit of the gourd family with a hard rind and juicy flesh" , "Ogen or cantaloupe, for instance" , "Type of pepo" .)