After brief crush, in love (7)
I believe the answer is:
worship
'love' is the definition.
(I know that worship is a type of love)
'after brief crush in' is the wordplay.
'after brief' becomes 'ors' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'crush' becomes 'whip' (whipping is a kind of crushing).
'in' indicates putting letters inside.
'ors' put within 'whip' is 'WORSHIP'.
Can you help me to learn more?
(Other definitions for worship that I've seen before include "Adore, venerate" , "Religious devotion" , "religious service" , "what can priest offer?" , "prayer" .)