Dangerous reptile flusters hack regularly visiting north-east (11)
I believe the answer is:
rattlesnake
'dangerous reptile' is the definition.
'rattlesnake' can be an answer for 'reptile' (type of snake). I am not certain of the 'dangerous' bit.
'flusters hack regularly visiting north-east' is the wordplay.
'flusters' becomes 'rattles' (I've seen this in another clue).
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'visiting' means one lot of letters goes inside another.
'north east' becomes 'ne'.
The alternate letters of 'hack' are 'ak'.
'ak' inserted inside 'ne' is 'nake'.
'rattles'+'nake'='RATTLESNAKE'
Can you help me to learn more?
(Other definitions for rattlesnake that I've seen before include "Poisonous (and noisy!) reptile" , "Poisonous creature" , "Serpent with noisy tail" , "Venomous creature" , "Potentially lethal reptile" .)