For example, American backed Charles (4,2)
I believe the answer is:
'for example' is the definition.
(I've seen this before)
'american backed charles' is the wordplay.
'american' becomes 'us'.
'backed' says the letters should be written backwards.
'charles' becomes 'chas' (shortened form).
'us' backwards is 'su'.
(Other definitions for such as that I've seen before include "Like" , "For example" .)