Arachnid, with stinging tail maybe, is on crop (8)
I believe the answer is:
scorpion
'arachnid' is the definition.
(scorpion is a kind of arachnid)
'maybe is on crop' is the wordplay.
'maybe' indicates an anagram.
'is'+'on'+'crop'='isoncrop'
'isoncrop' anagrammed gives 'SCORPION'.
'with stinging tail' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for scorpion that I've seen before include "Venomous creature" , "As above (Latin)" , "Stinging creature" , "Arachnid with venomous sting" , "Venemous creature" .)