All extremely suspect in Tory's unlikely tale (4,5)
I believe the answer is:
tall story
'unlikely tale' is the definition.
(I've seen this before)
'all extremely suspect in tory's' is the wordplay.
'extremely' means to remove the middle letters (letters on the extremes of the word are used).
'in' is an insertion indicator.
'suspect' with its middle removed is 'st'.
'all'+'st'='allst'
'allst' going within 'tory' is 'TALL STORY'.
(Other definitions for tall story that I've seen before include "romance?" , "Exaggerated and incredible yarn" , "Fairy tale" , "unreliable account" , "Fiction" .)