See about a share in power (5)
I believe the answer is:
clout
'power' is the definition.
(I've seen this before)
'see about a share' is the wordplay.
'see' becomes 'lo' (archaic exclamation meaning 'look!').
'about' indicates putting letters inside.
'a share' becomes 'cut' (cut is a kind of share).
'lo' inserted into 'cut' is 'CLOUT'.
'in' is the link.
(Other definitions for clout that I've seen before include "A blow; powerful influence" , "Smack - influence" , "Lay one on" , "Bash" , "Whack" .)