Consider filling about right for dip (6)
I believe the answer is:
crater
'dip' is the definition.
(thesaurus)
'consider filling about right' is the wordplay.
'consider' becomes 'rate' (I've seen this before).
'filling' means one lot of letters goes inside another.
'about' becomes 'c' (abbreviation for 'circa'**).
'right' becomes 'r' (common abbreviation).
'c'+'r'='cr'
'rate' placed inside 'cr' is 'CRATER'.
'for' is the link.
(Other definitions for crater that I've seen before include "Bowl-shaped hole in the ground" , "Hole of volcano or bomb" , "Pit resulting from impact or explosion" , "Cavity formed by explosion" , "Large bowl-shaped hollow" .)