A bat the nervous will find it difficult to stand (6)
I believe the answer is:
racket
'a bat' is the definition.
(I've seen this before)
'the nervous will find it difficult to stand' is the wordplay.
I cannot quite see how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found in the answer.
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is found in the answer.
'stand' could be 'rack' (synonyms) and 'rack' is located in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for racket that I've seen before include "Sports equipment" , "loud din" , "A lot of noise or stringed bat" , "Fuss - scam" , "Sports implement" .)