Ooze from spot on side (7)
I believe the answer is:
seepage
'ooze' is the definition.
(synonyms)
'spot on side' is the wordplay.
'spot' becomes 'see' (both can mean to notice or observe).
'on' means one lot of letters go next to another (in a down clue, letters appear on others).
'side' becomes 'page' (I've seen this before).
'see'+'page'='SEEPAGE'
'from' acts as a link.
(Other definitions for seepage that I've seen before include "running out slowly" , "Slow fluid loss" , "Slow leaking flow" , "Percolation" , "Discharge" .)