Ideas at home on cooking venison with a bit of thyme (10)

'ideas' is the definition.
(concepts or ideas)

'home on cooking venison with a bit of thyme' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'on' is a charade indicator (letters next to each other).
'cooking' indicates an anagram (cook can mean to falsify or distort).
'with' means one lot of letters go next to another.
'a bit of' indicates taking the first letters.
The initial letter of 'thyme' is 't'.
'venison' after 't' is 'tvenison'.
'tvenison' is an anagram of 'ventions'.
'in'+'ventions'='INVENTIONS'

'at' acts as a link.