At court, lied at first, it may be felt (4)
I believe the answer is:
wool
'be felt' is the definition.
(thesaurus)
'at court lied at first' is the wordplay.
'at' means one lot of letters go next to another.
'court' becomes 'woo' (both can mean to romance someone).
'at first' indicates taking the first letters.
The initial letter of 'lied' is 'l'.
'woo'+'l' is 'WOOL'.
'it may' 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 wool that I've seen before include "Fabric made from animal hair" , "Fleece of sheep" , "Sheep's yarn" , "Sheep's hair" , "Yarn - cloth" .)