Fantastic tale in which queen and knight get together for ever (7)
I believe the answer is:
eternal
'for ever' is the definition.
(I've seen this before)
'fantastic tale in which queen and knight' is the wordplay.
'fantastic' is an anagram indicator.
'in which' is an insertion indicator.
'queen' becomes 'er' (abbreviation for Elizabeth Regina).
'and' says to put letters next to each other.
'knight' becomes 'n' (chess).
'tale' is an anagram of 'etal'.
'er'+'n'='ern'
'etal' placed around 'ern' is 'ETERNAL'.
'get together' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for eternal that I've seen before include "going on for ever" , "Forever, never-ending" , "like Rome?" , "unchanged by time" , "Existing forever" .)