Gold article given to National Trust I initially considered genuine (9)
I believe the answer is:
authentic
'genuine' is the definition.
('authentic' can be similar in meaning to 'genuine')
'gold article given to national trust i initially considered' is the wordplay.
'gold' becomes 'au' (Au is the chemical symbol for gold).
'article' becomes 'the' (the 'definite article' part of speech**).
'given to' says to put letters next to each other.
'national trust' becomes 'nt'.
'initially' suggests taking the first letters.
The first letter of 'considered' is 'c'.
'au'+'the'+'nt'+'i'+'c'='AUTHENTIC'
(Other definitions for authentic that I've seen before include "reliable" , "Genuine, not a copy" , "Real, genuine" , "trustworthy" , "Ian, the cut is genuine" .)