A small photo showing lavender (5)
I believe the answer is:
aspic
'lavender' is the definition.
(I've seen this before)
'a small photo' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'photo' becomes 'pic' (I've seen this before).
'a'+'s'+'pic'='ASPIC'
'showing' acts as a link.
(Other definitions for aspic that I've seen before include "Savoury meat or fish jelly" , "Stock set with food" , "stock production" , "garnish" , "Savoury jelly used to coat eggs etc" .)