Headcase having row on the phone? (5)
I believe the answer is:
skull
'headcase' is the definition.
I can't tell whether this definition defines the answer.
'row on the phone?' is the wordplay.
'row' becomes 'scull' (to scull is to row a boat with sculls).
'on the phone?' indicates a 'sounds like' (homophone) clue (I've seen 'on the phone' mean this).
'scull' sounds like 'SKULL'.
'having' acts as a link.
Can you help me to learn more?
(Other definitions for skull that I've seen before include "Bony case of brain" , "Bony frame of head ..." , "Pirate flag feature" , "Brain casing" , "brains here" .)