Second cold chip (5)

I believe the answer is:

shard

'chip' is the definition.
(I've seen this before)

'second cold' is the wordplay.
'second' becomes 's' (common abbreviation).
'cold' becomes 'hard' (both can mean unemotional).
's'+'hard'='SHARD'

(Other definitions for shard that I've seen before include "Shell

I've seen this clue in The Telegraph.

Want a hint initially instead of a full solution? Install my app