Information obtained from climbing a bit (4)
I believe the answer is:
data
'information' is the definition.
(data are bits of information)
'climbing a bit' is the wordplay.
'climbing' is a reversal indicator (in a down clue, letters climb up).
'bit' becomes 'tad' (both can mean a small amount).
'a'+'tad'='atad'
'atad' in reverse letter order is 'DATA'.
'obtained from' is the link.
(Other definitions for data that I've seen before include "Facts and figures as processed by computer" , "information from bank" , "tables, perhaps" , "Information for/from computer" , "Raw facts" .)