'Sole' used in pun I queried (6)
I believe the answer is:
Here is my best explanation:
'sole' is the definition.
(I've seen this before)
'in pun i queried' is the wordplay.
'in' indicates the answer is hidden within the clue.
'UNIQUE' is hidden within 'pun i queried'.
'used' is the link.
(Other definitions for unique that I've seen before include "The only one of its kind", "Without equal or like", "One-off", "Being the only example", "it's most unusual", "Singular, not like any other", "Singular, one of a kind", "Unparalleled", "One of a kind" and "Radically distinctive and without equal".)