Worried teens in court become unable to relax (5,2)
I believe the answer is:
tense up
'worried teens in court become unable to relax' is the definition.
I can't tell whether this definition defines the answer.
'teens in court become unable to relax' is the wordplay.
I cannot really understand how this works, but
an anagram of 'teens' is 'tense' which is located in the answer.
'in court' could be 'up' and 'up' is found within the answer.
This accounts for all the letters.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for tense up that I've seen before include "become edgy" , "Become stiff through stress or anxiety" , "become uneasy" .)