Clue: Part of summer pudding studied, they say, declared 'in season' (10)
Answer: RED CURRANT
Explanation: Definition: Part of summer pudding
Two sound-alikes, individually indicated ('they say' and 'declared') of RED for READ ('studied') and CURRANT for CURRENT ('in season'). The ' seems to be getting a bit of an airing at the moment; it appeared in a clue in last week's Everyman.