A rugby player's embracing love that's very suitable (7)
I believe the answer is:
apropos
'very suitable' is the definition.
(apropos means appropriate or suitable)
'a rugby player's embracing love' is the wordplay.
'rugby player's' becomes 'prop's' (type of rugby player).
'embracing' is an insertion indicator.
'love' becomes 'o' (love means zero in tennis).
'props' going around 'o' is 'propos'.
'a'+'propos'='APROPOS'
'that's' is the link.
(Other definitions for apropos that I've seen before include "With regard to" , "Regarding" , "Poor sap (anag) - to the purpose" , "fitting" , "Poor sap, being to the point" .)