How entry was made to the Ark by fish - quickly (2,3,6)
I believe the answer is:
in two shakes
'quickly' is the definition.
(I've seen this before)
'how entry was made to the ark by fish' is the wordplay.
I cannot quite see how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found within the answer.
'fish' could be 'hake' (type of fish) and 'hake' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for in two shakes that I've seen is " Quickly".)