Portray fruit for unwanted third person (4,10)
I believe the answer is:
play gooseberry
'portray fruit for unwanted third person' is the definition.
I know nothing about this answer so I can't judge whether this works.
'portray fruit for unwanted third person' is the wordplay.
'portray fruit' becomes 'play' (I can't explain this - if you can you should give a lot more credence to this answer).
'for' says to put letters next to each other.
'unwanted third person' becomes 'gooseberry' (I've seen this before).
'play'+'gooseberry'='PLAY GOOSEBERRY'
Can you help me to learn more?
(Other definitions for play gooseberry that I've seen before include "Be the third party" , "Embarrass others" .)