In Genesis, allegedly, it's a sort of 'hemp' (5)
I believe the answer is:
sisal
'sort of hemp' is the definition.
'sisal' can be an answer for 'hemp' (I've seen this before). I'm unsure of the 'sort of' bit.
'in genesis allegedly it's a' is the wordplay.
'in' indicates a hidden word.
'SISAL' is hidden in the letters of 'genesis allegedly a'.
Can you help me to learn more?
(Other definitions for sisal that I've seen before include "Natural fibre" , "Agave cultivated for its fibre" , "Type of fibre" , "Fibre from agave plant" , "Sails (anag) - fibre" .)