The sort of grievance shown by one who has queued a considerable time? (4-8)
I believe the answer is:
long-standing
'queued a considerable time?' is the definition.
The answer and definition are not the same part of speech. However, past participle verbs and adjectives occasionally define each other.
'the sort of grievance shown by one' is the wordplay.
I cannot really see how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is present in the answer.
'of' could be 'o' and 'o' is present in the answer.
'one' could be 'an' (an apple is one apple) and 'an' is found in the answer.
This explanation may well be incorrect...
'who has' acts as a link.
Can you help me to learn more?
(Other definitions for long-standing that I've seen before include "Well-established" , "Inveterate" , "Well established" , "Existing over much time" , "In existence for years" .)