One full of gas going red when turned on by hooker (4,5)
I believe the answer is:
neon light
'one full' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'gas going red when turned on by hooker' is the wordplay.
'gas' becomes 'neon' (neon is a gas).
'going red when turned on by hooker' becomes 'light' (I can't justify this - if you can you should believe this answer much more).
'neon'+'light'='NEON LIGHT'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for neon light that I've seen before include "Type of illumination" , "Type of fluorescent lamp" , "Source of illumination" , "Advertising sign, perhaps" , "What may shine" .)