Herb in no-go area almost lost (7)
I believe the answer is:
oregano
'herb' is the definition.
(I know that oregano is a type of herb)
'no-go area almost lost' is the wordplay.
'almost' means to remove the last letter (most of the word but not all of it).
'lost' is an anagram indicator.
'no'+'go'+'area'='nogoarea'
'nogoarea' with its last letter taken off is 'nogoare'.
'nogoare' is an anagram of 'OREGANO'.
'in' is the link.
(Other definitions for oregano that I've seen before include "Marjoram-like herb" , "Gear Ono up for the herb" , "Herb related to marjoram" , "that's aromatic" , "Mediterranean herb" .)