Some dramatic attempt backfiring, it's understood (5)
I believe the answer is:
tacit
'understood' is the definition.
(thesaurus)
'some dramatic attempt backfiring' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'backfiring' is a reversal indicator.
'ticat' is hidden within 'dramatic attempt'.
'ticat' written backwards gives 'TACIT'.
'it's' is the link.
(Other definitions for tacit that I've seen before include "Implied but not directly expressed" , "Silently understood" , "Unspoken but implied" , "Understood without being directly expressed" , "Attic? (anag)" .)