In a screwy style, he gets lb59 (5)
I believe the answer is:
helix
'in a screwy style he gets lb59' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'he gets lb59' is the wordplay.
'gets' means one lot of letters go next to another.
'lb59' becomes 'lix' (I can't justify this - if you can you should give a lot more credence to this answer).
'he'+'lix'='HELIX'
Can you help me to learn more?
(Other definitions for helix that I've seen before include "Object with a three-dimensional shape, like a corkscrew" , "snail" , "Screwed coil" , "Structure made up of a continuous series of loops" , "A three-dimensional spiral" .)