Restrained allure with sweetheart taking time (9)
I believe the answer is:
temperate
'restrained' is the definition.
(similar in meaning)
'allure with sweetheart taking time' is the wordplay.
'allure' becomes 'tempera' (I can't explain this - if you can you should give a lot more credence to this answer).
'with' is a charade indicator (letters next to each other).
'sweetheart' becomes 'e' (the heart/centre of 'sweet').
'taking' is an insertion indicator.
'time' becomes 't' (abbreviation).
'tempera'+'e'='temperae'
'temperae' going around 't' is 'TEMPERATE'.
Can you help me to learn more?
(Other definitions for temperate that I've seen before include "Moderate, mild" , "even" , "Showing self-restraint" , "sober" , "comfortably warm?" .)