Reveal contents of text by model (6)
I believe the answer is:
expose
'reveal' is the definition.
(synonyms)
'contents of text by model' is the wordplay.
'contents of' means to look at the middle letters (I've seen 'content of' mean this).
'by' means one lot of letters go next to another.
'model' becomes 'pose' (synonyms).
The middle of 'text' is 'ex'.
'ex'+'pose'='EXPOSE'
(Other definitions for expose that I've seen before include "Reveal or unmask" , "Revelation of something discreditable - remove cover" , "Lay open, reveal" , "Uncover, expose to view" , "Lay out to view" .)