Young animal has fallen off iceberg (4)
I believe the answer is:
calf
This could be a double definition.
'young animal' is the first definition.
(I've seen this before)
'iceberg' is the second definition.
(I've seen this before)
'has fallen off' is the link.
This may not be right. Some or all of it may belong to one of the definitions.
Can you help me to learn more?
(Other definitions for calf that I've seen before include "Young animal associated with soft leather" , "binding?" , "A little lower" , "Young giraffe - piece of iceberg" , "Animal that yields veal" .)