PM in general beyond a gutless twit (6)
I believe the answer is:
attlee
'pm' is the definition.
(prime minister Clement Attlee)
'general beyond a gutless twit' is the wordplay.
'general' becomes 'lee' (Robert E. Lee - US revolutionary commander).
'beyond' is a charade indicator (letters next to each other).
'gutless' suggests removing the centre.
'twit' with its middle removed is 'tt'.
'a'+'tt'='att'
'lee' put after 'att' is 'ATTLEE'.
'in' is the link.
(Other definitions for attlee that I've seen before include "Clement ..., former British prime minister" , "Post-war British PM, Clement . . . . . ." , "Clement -, PM nineteen forty five - fifty one" , "Clement --, former PM" , "Labour prime minister, d. 1967" .)