A drifter of a coldly detached nature (7)
I believe the answer is:
iceberg
This might be a double definition.
'a drifter' is the first definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'a coldly detached nature' is the second definition.
The definition and answer can be both natural objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'of' is the link.
Can you help me to learn more?
(Other definitions for iceberg that I've seen before include "RMS Titanic's nemesis" , "Frozen shipping hazard" , "last scene of Titanic" , "Type of crisp lettuce" , "Frozen floater" .)