Ball in cricket match - one caught by short leg (8)
I believe the answer is:
testicle
'ball' is the definition.
('testicle' can be a synonym of 'ball')
'cricket match one caught by short leg' is the wordplay.
'cricket match' becomes 'test' (a test is a kind of cricket match).
'one' becomes 'i' (Roman numeral).
'caught' becomes 'c' (cricket abbreviation**).
'by' says to put letters next to each other.
'short' means to remove the last letter.
'leg' with its last letter taken off is 'le'.
'test'+'i'+'c'+'le'='TESTICLE'
'in' acts as a link.
(Another definition for testicle that I've seen is " Ball".)