Chubby type harassed doormen by pub (9)
I believe the answer is:
endomorph
'chubby type' is the definition.
The definition suggests a singular noun which matches the answer.
'harassed doormen by pub' is the wordplay.
'harassed' indicates an anagram.
'by' says to put letters next to each other.
'pub' becomes 'ph' (public house).
'doormen' with letters rearranged gives 'endomor'.
'endomor'+'ph'='ENDOMORPH'
Can you help me to learn more?
(Other definitions for endomorph that I've seen before include "Stocky person" , "Fatty type" , "Portly sort" , "fattish figure" , "Heavy person" .)