Closely connected, return bananas? (4,2,4)
I believe the answer is:
hand in hand
'closely connected' is the definition.
'hand-in-hand' can be an answer for 'connected' (thesaurus). I am not sure about the 'closely' bit.
'return bananas?' is the wordplay.
'return' becomes 'handin' (I can't justify this - if you can you should give a lot more credence to this answer).
'bananas?' becomes 'hand' (I've seen this before).
'handin'+'hand'='HAND-IN-HAND'
Can you help me to learn more?
(Other definitions for hand in hand that I've seen before include "Jointly" , "Give back all one's cards" , "What whist players have" , "together" .)