Inspire the old soak (5)
I believe the answer is:
imbue
This clue could be a double definition.
'inspire' is the first definition.
(I've seen this before)
'old soak' is the second definition.
'imbue' can be an answer for 'soak' (I've seen this in another clue). I am not sure about the 'old' bit.
'the' acts as a link.
Can you help me to learn more?
(Other definitions for imbue that I've seen before include "Spread or diffuse through; inspire" , "Tinge deeply" , "Fill with a feeling or quality" , "Inspire (with ideals)" , "Permeate, fill" .)