Withdraw from ramble around outside space (6)
I believe the answer is:
remove
'withdraw' is the definition.
(thesaurus)
'ramble around outside space' is the wordplay.
'ramble around' becomes 'rove' (I've seen this in another clue).
'outside' means one lot of letters goes inside another.
'space' becomes 'em' (in typography, a space as wide as a letter 'm').
'rove' enclosing 'em' is 'REMOVE'.
'from' is the link.
(Other definitions for remove that I've seen before include "Get rid of, take away (6)" , "class in school" , "Abolish" , "Transfer, detach" , "Subtract" .)