My face is friendly! (7)
I believe the answer is:
cordial
'friendly' is the definition.
(similar in meaning)
'my face' is the wordplay.
'my' becomes 'cor' (both are expressions of surprise).
'face' becomes 'dial' (face of a clock).
'cor'+'dial'='CORDIAL'
'is' is the link.
(Other definitions for cordial that I've seen before include "Affable type of sweet drink?" , "Warm and friendly; drink" , "7 [HEARTY]" , "Friendly; fruit drink" , "drink with a fruity flavour" .)