Four gentlemen display desire (4)
I believe the answer is:
urge
'desire' is the definition.
(I've seen this before)
'four gentlemen display' is the wordplay.
'display' indicates a hidden word (I've seen 'displays' mean this).
'URGE' is hidden in the letters of 'four gentlemen'.
(Other definitions for urge that I've seen before include "Press to do something" , "Advise earnestly, prod" , "Encourage or entreat earnestly" , "Plead" , "Encourage to go on, goad" .)