In the market I detect a two-way flow (4)
I believe the answer is:
tide
'two-way flow' is the definition.
'tide' can be an answer for 'flow' (I've seen this before). I am not sure about the 'two-way' bit.
'in the market i detect a' is the wordplay.
'in' says the answer is hidden in the clue.
'TIDE' is hidden in the letters of 'market i detect a'.
Can you help me to learn more?
(Other definitions for tide that I've seen before include "Ebber and flower?" , "Surge of events" , "''There is a ... in the affairs of men'' (Julius Caesar)" , "Periodic water movement" , "Powerful surge" .)