Liking to write and sing (8)
I believe the answer is:
penchant
'liking' is the definition.
(penchant is a kind of liking)
'write and sing' is the wordplay.
'write' becomes 'pen' ('pen' can be a synonym of 'write').
'and' says to put letters next to each other.
'sing' becomes 'chant' (chanting is a kind of singing).
'pen'+'chant'='PENCHANT'
'to' is the link.
(Other definitions for penchant that I've seen before include "Leaning towards or liking for" , "'Predilection, a strong liking (8)'" , "Fondness (for) - bias (towards)" , "Disposition" , "Predilection, preference" .)