Refuse to let go of castle, in part (4)
I believe the answer is:
keep
I believe this is a quadruple definition!!
'refuse' is the first definition.
(I know that refuse is a kind of keep)
'to let go' is the second definition.
The definition and answer can be both to do with fundamental existence as well as being verbs in their base form.
Maybe they are linked in a way I don't understand?
'of' acts as a link.
'castle' is the third definition.
(keep is a type of castle)
'in' acts as a link.
'part' is the fourth definition.
(I have seen 'part of castle' mean 'keep' so perhaps 'part' could also mean 'keep')
Can you help me to learn more?
(Other definitions for keep that I've seen before include "Board and lodgings, perhaps" , "honour" , "run" , "strong position" , "Retain in old castle (4)" .)