Look for germ doubling in the end (4)
I believe the answer is:
seek
'look for' is the definition.
(synonyms)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for seek that I've seen before include "Go looking for" , "Attempt to find; ask for" , "Ask for (permission)" , "Hunt, look for" , "Try to find" .)