Obtain diamonds? It’s a breeze (4)
I believe the answer is:
wind
'a breeze' is the definition.
(I've seen this before)
'obtain diamonds?' is the wordplay.
'obtain' becomes 'win' (I can't explain this - if you can you should believe this answer much more).
'diamonds?' becomes 'd' (abbreviation in bridge say).
'win'+'d'='WIND'
'it's' is the link.
Can you help me to learn more?
(Other definitions for wind that I've seen before include "Air-current" , "Gust, e.g." , "Breath; twist" , "Twist or turn (in course)" , "section of orchestra" .)