Support new settler (7)
I believe the answer is:
'support' is the definition.
(I've seen this before)
'new settler' is the wordplay.
'new' indicates anagramming the letters.
'settler' anagrammed gives 'TRESTLE'.
(Other definitions for trestle that I've seen before include "support for board" , "Framework to hold table top" , "Letters about a table support" , "Supporter" , "Supported (and supporting) board" .)