Round figure with right clothing is content (5)
I believe the answer is:
tenor
'content' is the definition.
(tenor is a kind of content)
'round figure with right clothing' is the wordplay.
'round' becomes 'o' (round can mean a round object).
'figure' becomes 'ten' (ten is a number or figure).
'with right' becomes 'r' (common abbreviation. I am not sure about the 'with' bit.).
'clothing' indicates putting letters inside (some letters cover up or clothe others).
'ten'+'r'='tenr'
'o' put within 'tenr' is 'TENOR'.
'is' is the link.
Can you help me to learn more?
(Other definitions for tenor that I've seen before include "Male singing voice of high pitch" , "Vocal range" , "range of 14 across [GIGLI]" , "General drift or meaning" , "Pavarotti, for example" .)