Bad mushroom trip's beginning in a frenzy (7)
I believe the answer is:
amanita
'bad mushroom' is the definition.
'amanita' can be an answer for 'mushroom' (I've seen this in another clue). I am not sure about the 'bad' bit.
'trip's beginning in a frenzy' is the wordplay.
'beginning' says to take the initial letters.
'in' is an insertion indicator.
'frenzy' becomes 'mania' (I've seen this in another clue).
The initial letter of 'trips' is 't'.
'a'+'mania'='amania'
't' inserted inside 'amania' is 'AMANITA'.
Can you help me to learn more?
(Other definitions for amanita that I've seen before include "Mushroom genus" , "Variety of mushroom" , "fungus that could be deadly" , "Poisonous mushroom" , "Genus of mushrooms" .)