Menace near the front of tent, moving (8)
I believe the answer is:
threaten
'menace' is the definition.
('threaten' can be a synonym of 'menace')
'near the front of tent moving' is the wordplay.
'front of' indicates taking the first letters.
'moving' is an anagram indicator.
The initial letter of 'tent' is 't'.
'near'+'the'+'t'='nearthet'
'nearthet' with letters rearranged gives 'THREATEN'.
(Other definitions for threaten that I've seen before include "Give warning of something unpleasant" , "Put at risk, endanger" , "Utter menaces" , "Utter intentions of injury or punishment" , "'Menace, intimidate (8)'" .)