Awakening of love in Laura's unexpected (7)
I believe the answer is:
arousal
'awakening' is the definition.
(I've seen this before)
'love in laura's unexpected' is the wordplay.
'love' becomes 'o' (In tennis, 'love' means 'zero').
'in' indicates putting letters inside.
'unexpected' is an anagram indicator.
'lauras' with letters rearranged gives 'arusal'.
'o' put inside 'arusal' is 'AROUSAL'.
'of' is the link.
(Other definitions for arousal that I've seen before include "Drinking spree" , "heating?" , "Awakening (of emotion, etc)" , "Act of awakening" , "Sexual excitement" .)