Weak figure you love, American (7)
I believe the answer is:
tenuous
'weak' is the definition.
(similar in meaning)
'figure you love american' is the wordplay.
'figure' becomes 'ten' (ten is a number).
'you' becomes 'u' (homophones).
'love' becomes 'o' (love means zero in tennis).
'american' becomes 'US' (abbreviation for United States).
'ten'+'u'+'o'+'us'='TENUOUS'
(Other definitions for tenuous that I've seen before include "Very slight (connection)" , "Sketchy" , "Very slight, insubstantial" , "Very thin in form, having little validity" , "Lacking substance or significance" .)