Tame bats held by back of neck - you'll need to get a handle on it (8)
I believe the answer is:
nametape
'you'll need to get a handle on it' is the definition.
I can't judge whether this defines the answer.
'tame bats held by back of neck' is the wordplay.
'bats' is an anagram indicator (slang for mad).
'held by' indicates putting letters inside.
'back of neck' becomes 'nape' (nape means the back of someone's neck).
'tame' anagrammed gives 'amet'.
'amet' inserted within 'nape' is 'NAMETAPE'.
Can you help me to learn more?
(Other definitions for nametape that I've seen before include "Identification sewn on clothing" , "ID sewn onto clothing" , "evidence of ownership" .)