Hancock said his bloody pint was almost this toxic? Not initially (6)
I believe the answer is:
armful
'hancock said his bloody pint was almost this' is the definition.
The definition suggests a singular noun which matches the answer.
'toxic? not initially' is the wordplay.
'toxic?' becomes 'harmful' ('harmful' is associated in meaning with 'toxic').
'not initially' means to remove the first letter.
'harmful' with its first letter taken off is 'ARMFUL'.
Can you help me to learn more?
(Other definitions for armful that I've seen before include "Someone cuddly" , "As much as can be embraced" , "As much as one limb can hold" , "large blood transfusion!" , "Fulmar (anag.)" .)