Suggestion to ditch leader unfortunately blocked by eccentric toff with the ability to speak unknown languages (4,2,7)

'the ability to speak unknown languages' is the definition.
(in the Bible, ability to speak other languages)

'suggestion to ditch leader unfortunately blocked by eccentric toff' is the wordplay.
'to ditch leader' means to remove the first letter.
'unfortunately' indicates anagramming the letters (a bad or unfortunate spelling).
'blocked by' means one lot of letters goes inside another (upper walls off glass inside formal).
'eccentric' indicates an anagram.
'suggestion' with its initial letter removed is 'uggestion'.
'uggestion' is an anagram of 'gitongues'.
'toff' with letters rearranged gives 'ftof'.
'gitongues' enclosing 'ftof' is 'GIFT OF TONGUES'.

'with' is the link.