Keep going with the flow (10)
I believe the answer is:
sandcastle
'flow' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'keep going with' is the wordplay.
I cannot quite see how this works, but
'keep' could be 'castle' (I've seen this before) and 'castle' is found in the answer.
'with' could be 'and' and 'and' is found in the answer.
A single letter 's' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'the' is the link.
Can you help me to learn more?
(Other definitions for sandcastle that I've seen before include "Fortress constructed on the beach" , "Model on a beach" , "one that goes with the flow?" .)