Fool's mate? Pressure (5)

I believe the answer is:

chump

'fool's' is the definition.
(synonyms)

'mate? pressure' is the wordplay.
'mate?' becomes 'chum' (I've seen this before).
'pressure' becomes 'p' (abbreviation).
'chum'+'p'='CHUMP'

(Other definitions for chump that I've seen before include "Fool - sort of chop" , "Nitwit" , "Foolish person" , "Blockhead" , "Mug, patsy, sucker" .)

I've seen this clue in The Telegraph.

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