Crossword Genius

Hard to contact us? Ring in (7)

Ross

I believe the answer is:

callous

'hard' is the definition.
(similar in meaning)

'contact us? ring in' is the wordplay.
'contact' becomes 'call'.
'ring' becomes 'o' (letter resembling a ring).
'in' is an insertion indicator.
'call'+'us'='callus'
'callus' enclosing 'o' is 'CALLOUS'.

'to' is the link.

(Other definitions for callous that I've seen before include "Hard and unfeeling" , "Cruel and unfeeling" , "Not feeling" , "Cruelly unfeeling" , "Insensitive, cruel" .)

I've seen this clue in The Sun.
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