Sing the praises of former tax cut (5)
I believe the answer is:
extol
'sing the praises of' is the definition.
(I've seen this before)
'former tax cut' is the wordplay.
'former' becomes 'ex' (prefix meaning former or onetime).
'tax' becomes 'toll' (I've seen this in other clues).
'cut' means to remove the last letter.
'toll' with its final letter removed is 'tol'.
'ex'+'tol'='EXTOL'
(Other definitions for extol that I've seen before include "trumpet" , "Highly commend" , "Sing the praises of" , "Crack up" , "Proclaim" .)