Consider, say, sailors' spells of leave ashore to be overfamiliar (4)
I believe the answer is:
take
'consider say' is the definition.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for take that I've seen before include "Remove; consume" , "Lay hold of" , "Receive; subtract" , "Endure; single recording" , "Accept or steal?" .)