Recommend one's red crackers (7)
I believe the answer is:
endorse
'recommend' is the definition.
(thesaurus)
'one's red crackers' is the wordplay.
'crackers' indicates anagramming the letters (informal term for mad).
'ones'+'red'='onesred'
'onesred' with letters rearranged gives 'ENDORSE'.
(Other definitions for endorse that I've seen before include "Pass" , "Countersign" , "Approve or underwrite" , "Sore end (anag.)" , "Give backing to" .)