Gloom of daughter on vessel on Scotland's deep loch (8)
I believe the answer is:
darkness
'gloom' is the definition.
(I've seen this before)
'daughter on vessel on scotland's deep loch' is the wordplay.
'daughter on vessel on scotland's deep' becomes 'dark' (I can't justify this - if you can you should believe this answer much more).
'loch' becomes 'ness' (Loch Ness in Scotland).
'dark'+'ness'='DARKNESS'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for darkness that I've seen before include "Evil; lack of light" , "Unlit state" , "Absence of light" , "'... cannot drive out ...: only light can do that'' (Martin Luther King)" , "Absence of illumination" .)