A fortifying drink is what might make Hoskins get up! (9)

I believe the answer is:

stiffener

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'a fortifying drink' is the definition.
'stiffener' can be an answer for 'drink' (I have seen 'strong drink' mean 'stiffener' so perhaps 'drink' could also mean 'stiffener'). I am not sure about the 'a fortifying' bit.

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for stiffener that I've seen before include "Strong drink - starch?" , "Fortifying alcoholic drink (slang)" , "Acquire Dutch courage" , "Strengthening piece" .)

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