Singular bargain just the ticket (5)
I believe the answer is:
ideal
'just the ticket' is the definition.
(I've seen this in another clue)
'singular bargain' is the wordplay.
'singular' becomes 'i' (I can't justify this - if you can you should give a lot more credence to this answer).
'bargain' becomes 'deal' (synonyms).
'i'+'deal'='IDEAL'
Can you help me to learn more?
(Other definitions for ideal that I've seen before include "existing only in imagination" , "highly desirable" , "Just perfect, couldn't be better" , "Optimum" , "principle to be aimed at" .)