Fruit with a lot of starchy seeds put in a container for jam (7)
I believe the answer is:
apricot
'fruit' is the definition.
(type of fruit)
'in a container for jam' is the wordplay.
'in' is an insertion indicator.
'container' becomes 'pot' (pot is a kind of container).
'for jam' becomes 'ric' (I can't justify this - if you can you should give a lot more credence to this answer).
'a'+'pot'='apot'
'apot' going around 'ric' is 'APRICOT'.
'with a lot of starchy seeds put' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for apricot that I've seen before include "Orange-yellow fruit in plum family" , "shade" , "Fruit from a tropic" , "Yellow fruit" , "Juicy fruit" .)