Current club lacking leadership (5)
I believe the answer is:
river
'current' is the definition.
(I've seen this before)
'club lacking leadership' is the wordplay.
'club' becomes 'driver' (type of golf club).
'lacking leadership' means to remove the first letter.
'driver' with its initial letter taken off is 'RIVER'.
(Other definitions for river that I've seen before include "Dee, Exe or Wye, say" , "x or y, so to speak" , "Waterway" , "Eg, Thames or Nile" , "Current" .)