Stuttering woe, possibly? (6-7)
I believe the answer is:
'stuttering woe possibly?' is the definition.
I can't judge whether this defines the answer.
'stuttering woe possibly?' is the wordplay.
'possibly?' indicates an anagram (I've seen 'possibly' mean this).
'stutteringwoe' anagrammed gives 'TONGUE-TWISTER'.
Can you help me to learn more?
(Other definitions for tongue twister that I've seen before include "What's difficult to say" , "Phrase that is difficult to say properly" , "'I wish to wash my Irish wristwatch', perhaps" , "Eg, the sixth sheik's sixth sheep's sick" , "Difficult saying?" .)