Clue: One given a clout roughly – what a surprise! – for ungrammatical constructions (10)
Answer: ANACOLUTHA
Explanation: Definition: ungrammatical constructions
**AN** ("one") *given ****(a clout)** [anag:*roughly*] + **HA **("what a surprise!") 
*An* "anacoluthon"* is a sentence in which the expected grammatical sequence is absent, eg "while in the garden, the door banged shut"