Penalty also given to the current old doctor providing tool for searchers? (4-7,4)

'tool for searchers?' is the definition.
(as in to 'go through with a fine-toothed comb')

'penalty also given to the current old doctor' is the wordplay.
'penalty' becomes 'fine' (fine is a kind of penalty).
'also' becomes 'too' (synonyms).
'given to' says to put letters next to each other.
'current old doctor' becomes 'dcomb' (I am not sure about this - if you are sure you should believe this answer much more).
'fine'+'too'+'the'+'dcomb'='FINE-TOOTHED COMB'

'providing' is the link.